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Hammarback LA, Medina-Gil T, Sadurní A, Echavarren AM. Three-Component Gold(I)-Catalyzed Alkoxyvinylation. Org Lett 2024; 26:6375-6379. [PMID: 39025472 DOI: 10.1021/acs.orglett.4c02102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2024]
Abstract
Acetylene has been underexploited despite being a highly valuable feedstock for chemical synthesis. We have developed the first true gold(I)-catalyzed intermolecular three-component reaction between acetylene, alkenes, and alcohols to afford β-vinyl hemiaminal scaffolds from N-vinyl amides. Unusual biscyclopropyl and 3-vinyl N-heterocyclic scaffolds were obtained through the incorporation of a second N-vinyl unit or tethered alkene into the starting material.
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Affiliation(s)
- L Anders Hammarback
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), 43007 Tarragona, Spain
| | - Tania Medina-Gil
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), 43007 Tarragona, Spain
- Departament de Química Orgànica i Analítica, Universitat Rovira i Virgili (URV), 43007 Tarragona, Spain
| | - Anna Sadurní
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), 43007 Tarragona, Spain
| | - Antonio M Echavarren
- Institute of Chemical Research of Catalonia (ICIQ), Barcelona Institute of Science and Technology (BIST), 43007 Tarragona, Spain
- Departament de Química Orgànica i Analítica, Universitat Rovira i Virgili (URV), 43007 Tarragona, Spain
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2
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Masand VH, Al-Hussain S, Alzahrani AY, Al-Mutairi AA, Sultan Alqahtani A, Samad A, Alafeefy AM, Jawarkar RD, Zaki MEA. Unveiling dynamics of nitrogen content and selected nitrogen heterocycles in thrombin inhibitors: a ceteris paribus approach. Expert Opin Drug Discov 2024; 19:991-1009. [PMID: 38898679 DOI: 10.1080/17460441.2024.2368743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 06/12/2024] [Indexed: 06/21/2024]
Abstract
BACKGROUND Despite the progress in comprehending molecular design principles and biochemical processes associated with thrombin inhibition, there is a crucial need to optimize efforts and curtail the recurrence of synthesis-testing cycles. Nitrogen and N-heterocycles are key features of many anti-thrombin drugs. Hence, a pragmatic analysis of nitrogen and N-heterocycles in thrombin inhibitors is important throughout the drug discovery pipeline. In the present work, the authors present an analysis with a specific focus on understanding the occurrence and distribution of nitrogen and selected N-heterocycles in the realm of thrombin inhibitors. RESEARCH DESIGN AND METHODS A dataset comprising 4359 thrombin inhibitors is used to scrutinize various categories of nitrogen atoms such as ring, non-ring, aromatic, and non-aromatic. In addition, selected aromatic and aliphatic N-heterocycles have been analyzed. RESULTS The analysis indicates that ~62% of thrombin inhibitors possess five or fewer nitrogen atoms. Substituted N-heterocycles have a high occurrence, like pyrrolidine (23.24%), pyridine (20.56%), piperidine (16.10%), thiazole (9.61%), imidazole (7.36%), etc. in thrombin inhibitors. CONCLUSIONS The majority of active thrombin inhibitors contain nitrogen atoms close to 5 and a combination of N-heterocycles like pyrrolidine, pyridine, piperidine, etc. This analysis provides crucial insights to optimize the transformation of lead compounds into potential anti-thrombin inhibitors.
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Affiliation(s)
- Vijay H Masand
- Department of Chemistry, Vidya Bharati Mahavidyalaya, Amravati, India
| | - Sami Al-Hussain
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi Arabia
| | - Abdullah Y Alzahrani
- Department of Chemistry, Faculty of Science and Arts, King Khalid University, Mohail Asser, Saudi Arabia
| | - Aamal A Al-Mutairi
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi Arabia
| | - Arwa Sultan Alqahtani
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi Arabia
| | - Abdul Samad
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Tishk International University, Erbil, Iraq
| | - Ahmed M Alafeefy
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Universiti Teknologi MARA [UiTM], Bandar Puncak Alam, Selangor, Malaysia
| | - Rahul D Jawarkar
- Department of Medicinal Chemistry and Drug Discovery, Dr Rajendra Gode Institute of Pharmacy, Amravati, India
| | - Magdi E A Zaki
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University, Riyadh, Saudi Arabia
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3
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Effiong ME, Bella-Omunagbe M, Afolabi IS, Chinedu SN. In silico evaluation of potential breast cancer receptor antagonists from GC-MS and HPLC identified compounds in Pleurotus ostreatus extracts. RSC Adv 2024; 14:23744-23771. [PMID: 39131188 PMCID: PMC11310660 DOI: 10.1039/d4ra03832k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Accepted: 07/18/2024] [Indexed: 08/13/2024] Open
Abstract
Introduction: Pharmacotherapeutic targets for breast cancer include the estrogen receptor (ER), progesterone receptor (PR), and human epidermal growth factor receptor (EGFR). Inhibitors of these receptors could be interesting therapeutic candidates for the treatment and management of breast cancer (BC). Aim: This study used GC-MS and HPLC to identify bioactive compounds in Pleurotus ostreatus (P. ostreatus) extracts and applied in silico methods to identify potent EGFR, ER, and PR inhibitors from the compounds as potential drug candidates. Method: GC-MS and HPLC were used to identify bioactive chemicals in P. ostreatus extracts of aqueous (PO-A), methanol (PO-M), ethanol (PO-E), chloroform (PO-C), and n-hexane (PO-H). The ER, PR, and EGFR model optimization and molecular docking of compounds/control inhibitors in the binding pocket were simulated using AutoDock Vina in PyRx. The drug-likeness, pharmacokinetic, and pharmacodynamic features of prospective docking leads were all anticipated. Result: The results indicated the existence of 29 compounds in PO-A, 36 compounds in PO-M and PO-E, 42 compounds in PO-C, and 22 compounds in PO-H extracts. With ER, only o-tolylamino-acetic acid (4-nitro-benzylidene)-hydrazide (-7.5 kcal mol-1) from the ethanolic extract could bind to the receptor. PR and EGFR, on the other hand, identified several compounds with higher binding affinities than the control. Ergotaman-3',6',18-trione (-8.1 kcal mol-1), 5,10-diethoxy-2,3,7,8-tetrahydro-1H,6H-dipyrrolo[1,2-a:1',2'-d]pyrazine (-7.8 kcal mol-1) from the aqueous extract; o-tolylamino-acetic acid (4-nitro-benzylidene)-hydrazide (-8.4 kcal mol-1) from the ethanolic extract had better binding affinity compared to progesterone (-7.7 kcal mol-1). Likewise, ergotaman-3',6',18-trione (-9.7 kcal mol-1) from the aqueous extract and phenol, 2,4-bis(1,1-dimethyl ethyl) (-8.2 kcal mol-1) from the chloroform extract had better binding affinities compared to the control, gefitinib (-7.9 kcal mol-1) with regards to EGFR. None of the PO-H or PO-M extracts outperformed the control for any of the proteins. Phenols and flavonoids such as quercetin, luteolin, rutin, chrysin, apigenin, ellagic acid, and naringenin had better binding affinity to PR and EGFR compared to their control. Conclusion: The identified compounds in the class of phenols and flavonoids were better lead molecules due to their ability to strongly bind to the proteins' receptors. These compounds showed promising drug-like properties; they could be safe and new leads for creating anticancer medicines.
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Affiliation(s)
- Magdalene Eno Effiong
- Department of Biochemistry, College of Science and Technology, Covenant University Canaanland, PMB 1023 Ota Ogun State Nigeria
- Covenant Applied Informatics and Communication Africa Centre of Excellence (CApIC-ACE) Nigeria
| | - Mercy Bella-Omunagbe
- Department of Biochemistry, College of Science and Technology, Covenant University Canaanland, PMB 1023 Ota Ogun State Nigeria
- Covenant Applied Informatics and Communication Africa Centre of Excellence (CApIC-ACE) Nigeria
| | - Israel Sunmola Afolabi
- Department of Biochemistry, College of Science and Technology, Covenant University Canaanland, PMB 1023 Ota Ogun State Nigeria
- Covenant University Public Health and Wellbeing Research Cluster (CUPHWERC), Covenant University Canaanland, PMB 1023 Ota Ogun State Nigeria
| | - Shalom Nwodo Chinedu
- Department of Biochemistry, College of Science and Technology, Covenant University Canaanland, PMB 1023 Ota Ogun State Nigeria
- Covenant University Public Health and Wellbeing Research Cluster (CUPHWERC), Covenant University Canaanland, PMB 1023 Ota Ogun State Nigeria
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4
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Ghosh KK, RajanBabu TV. Ligand Effects in Carboxylic Ester- and Aldehyde-Assisted β-C-H Activation in Regiodivergent and Enantioselective Cycloisomerization-Hydroalkenylation and Cycloisomerization-Hydroarylation, and [2 + 2 + 2]-Cycloadditions of 1,6-Enynes. J Am Chem Soc 2024; 146:18753-18770. [PMID: 38935521 DOI: 10.1021/jacs.4c06796] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/29/2024]
Abstract
Herein, we report room temperature, atom-economic protocols for high regio- and enantioselective tandem cycloisomerization-hydroarylation and cycloisomerization-hydroalkenylation of 1,6-enynes leading to vicinal carba-functionalized pyrrolidines, tetrahydrofurans, and cyclopentanes. The latter steps in these processes involve carbonyl-coordination-assisted ortho-C-H activation of aromatic aldehydes and esters, and, a similar, yet rarely seen, β-C-H activation in the case of the acrylates. Synthetically useful enantioselective versions of such reactions are rare and are limited to the C2-H activation of indoles and pyrroles. A similar reaction is also observed with N-vinylphthalimide, which also has a carbonyl group suitable for C-H activation. A dibenzooxaphosphole ligand, (2S,2S',3S,3S')-MeO-BIBOP was uniquely identified as crucial to achieving the challenging regio- and enantioselectivity. This methodology gives access to substituted five-membered carbo- and heterocyclic compounds in good yields and excellent enantioselectivities under a low catalyst loading. A primary KIE of 3.5 is observed in an intermolecular competition experiment with methyl benzoate and d5-methyl benzoate, which indicates that the C-H cleavage is the turnover-limiting step of this process. Unlike the acrylates, which undergoes exclusive hydroalkenylation, a β, γ-unsaturated ester, methyl but-3-enoate, undergoes the highly enantioselective cycloisomerization-coupling sequence with a 1,6-enyne giving either a [2 + 2 + 2]-cycloaddition with (S, S)-BDPP or hydroalkenylation with (2S,2'S,3S,3'S)-MeO-BIBOP depending on the ligand employed. The (E)-configuration of the newly formed double bond at the terminal alkynyl carbon (of the starting enyne) in the hydroalkenylation product of β,γ-unsaturated ester suggests a more classical migratory insertion-β-hydride elimination route for the formation of this product.
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Affiliation(s)
- Kiron K Ghosh
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
| | - T V RajanBabu
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States
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5
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Kumar SV, Olusegun J, Guiry PJ. Zn(II)-catalyzed asymmetric [3 + 2] cycloaddition of acyclic enones with azomethine ylides. Org Biomol Chem 2024. [PMID: 38920098 DOI: 10.1039/d4ob00854e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2024]
Abstract
The Zn(II)/UCD-Imphanol-catalyzed highly endo-selective [3 + 2] asymmetric cycloaddition of acyclic enones and azomethine ylides has been developed. Moderate to high yields (up to 94%) with excellent endo/exo selectivities (99 : 1) and enantioselectivities up to 96.5 : 3.5 er were obtained.
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Affiliation(s)
- Sundaravel Vivek Kumar
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Jeremiah Olusegun
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
| | - Patrick J Guiry
- Centre for Synthesis and Chemical Biology, School of Chemistry, University College Dublin, Belfield, Dublin 4, Ireland.
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6
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Guria S, Volkov AN, Khudaverdyan R, Van Lommel R, Pan R, Daniliuc CG, De Proft F, Hennecke U. Enantioselective, Bro̷nsted Acid-Catalyzed Anti-selective Hydroamination of Alkenes. J Am Chem Soc 2024; 146:17180-17188. [PMID: 38875460 DOI: 10.1021/jacs.4c03306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2024]
Abstract
Chiral pyrrolidines are common structural motives in natural products as well as active pharmaceutical ingredients, explaining the need for methods for their enantioselective synthesis. While several, often metal-catalyzed, methods for their preparation do exist, the enantioselective synthesis of pyrrolidines containing quaternary stereocenters remains challenging. Herein, we report a Bro̷nsted acid-catalyzed intramolecular hydroamination that provides such pyrrolidines from simple starting materials in high yield and enantioselectivity. Key to an efficient reaction was the use of an electron-deficient protective group on nitrogen, the common nosyl-protecting group, to avoid deactivation of the Bro̷nsted acid by deprotonation. The reaction proceeds as a stereospecific anti-addition indicating a concerted reaction. Furthermore, kinetic studies show Michaelis-Menten behavior, suggesting the formation of a precomplex similar to those observed in enzymatic catalysis.
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Affiliation(s)
- Sudip Guria
- Organic Chemistry Research Group, Department of Chemistry and Department of Bioengineering Sciences, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium
| | - Alexander N Volkov
- VIB Centre for Structural Biology, Vlaams Instituut voor Biotechnologie (VIB), Pleinlaan 2, 1050 Brussels,Belgium
- Jean Jeener NMR Centre, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium
| | - Raffi Khudaverdyan
- Organic Chemistry Research Group, Department of Chemistry and Department of Bioengineering Sciences, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium
| | - Ruben Van Lommel
- General Chemistry Research Group, Department of Chemistry, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium
| | - Rittwika Pan
- Organic Chemistry Research Group, Department of Chemistry and Department of Bioengineering Sciences, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium
| | - Constantin G Daniliuc
- Organisch-Chemisches Institut, University of Münster, Corrensstr. 40, 48149 Münster, Germany
| | - Frank De Proft
- General Chemistry Research Group, Department of Chemistry, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium
| | - Ulrich Hennecke
- Organic Chemistry Research Group, Department of Chemistry and Department of Bioengineering Sciences, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussels, Belgium
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7
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Porte V, van Veen BC, Zhang H, Piacentini P, Matheu SA, Woolford S, Sokol KR, Shaaban S, Weinstabl H, Maulide N. Synthesis of Complex Tetracyclic Fused Scaffolds Enabled by (3 + 2) Cycloaddition. Org Lett 2024; 26:4873-4876. [PMID: 38820198 PMCID: PMC11187634 DOI: 10.1021/acs.orglett.4c01269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 05/20/2024] [Accepted: 05/23/2024] [Indexed: 06/02/2024]
Abstract
We describe the single-step formation of complex tetracyclic fused scaffolds enabled by (3 + 2) cycloaddition of azomethine ylides. Various indoles, N-protecting groups, and amino acids are well tolerated. The products are obtained in a catalyst-free manner with moderate to excellent yield and high diastereoselectivity. Representing a new scaffold that is not yet found in nature, the construction of pyrrolidine-fused cyclohepta-, azepino-, or oxepinoindoles could be found valuable in the synthesis of new pseudo-natural products.
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Affiliation(s)
- Vincent Porte
- Christian
Doppler Laboratory for Entropy-Oriented Drug Design, Institute of
Organic Chemistry, University of Vienna, 1090 Vienna, Austria
| | - Branca C. van Veen
- Christian
Doppler Laboratory for Entropy-Oriented Drug Design, Institute of
Organic Chemistry, University of Vienna, 1090 Vienna, Austria
| | - Haoqi Zhang
- Christian
Doppler Laboratory for Entropy-Oriented Drug Design, Institute of
Organic Chemistry, University of Vienna, 1090 Vienna, Austria
| | - Paolo Piacentini
- Christian
Doppler Laboratory for Entropy-Oriented Drug Design, Institute of
Organic Chemistry, University of Vienna, 1090 Vienna, Austria
| | - Sergio Armentia Matheu
- Christian
Doppler Laboratory for Entropy-Oriented Drug Design, Institute of
Organic Chemistry, University of Vienna, 1090 Vienna, Austria
| | - Sophie Woolford
- Christian
Doppler Laboratory for Entropy-Oriented Drug Design, Institute of
Organic Chemistry, University of Vienna, 1090 Vienna, Austria
| | - Kevin R. Sokol
- Boehringer
Ingelheim RCV GmbH&CoKG, 1120 Vienna, Austria
| | - Saad Shaaban
- Christian
Doppler Laboratory for Entropy-Oriented Drug Design, Institute of
Organic Chemistry, University of Vienna, 1090 Vienna, Austria
| | | | - Nuno Maulide
- Christian
Doppler Laboratory for Entropy-Oriented Drug Design, Institute of
Organic Chemistry, University of Vienna, 1090 Vienna, Austria
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8
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Yuan W, Ma Y, Zhang H. Development of heterocyclic-based frameworks as potential scaffold of 5-HT1A receptor agonist and future perspectives: A review. Medicine (Baltimore) 2024; 103:e38496. [PMID: 38875413 PMCID: PMC11175882 DOI: 10.1097/md.0000000000038496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Revised: 05/14/2024] [Accepted: 05/16/2024] [Indexed: 06/16/2024] Open
Abstract
As a subtype of the 5-hydroxytryptamine (5-HT) receptor, 5-HT1A receptors are involved in the pathological process of psychiatric disorders and is an important target for antidepressants. The research groups focus on these area have tried to design novel compounds to alleviate depression by targeting 5-HT1A receptor. The heterocyclic structures is an important scaffold to enhance the antidepressant activity of ligands, including piperazine, piperidine, benzothiazole, and pyrrolidone. The current review highlights the function and significance of nitrogen-based heterocyclics 5-HT1AR represented by piperazine, piperidine, benzothiazole, and pyrrolidone in the development of antidepressant.
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Affiliation(s)
- Weihua Yuan
- School of Acupuncture-Moxibustion and Tuina, Anhui University of Chinese Medicine, Hefei, China
| | - Yanyan Ma
- Gumei Community Health Service Centre, Shanghai Medical College of Fudan University, Shanghai, China
| | - Hui Zhang
- School of Acupuncture-Moxibustion and Tuina, Anhui University of Chinese Medicine, Hefei, China
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9
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Maity A, Studer A. Intramolecular Radical Amidooxygenation of Alkenes for the Construction of Pyrrolidinones. Org Lett 2024. [PMID: 38814142 DOI: 10.1021/acs.orglett.4c01607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
An intramolecular 1,2-amidooxygenation of unactivated alkenes for the construction of the pyrrolidinone scaffold containing a masked 5-hydroxymethyl functionality is reported. γ,δ-Unsaturated N-aryloxyamides react with sodium 2,2,6,6-tetramethylpiperidin-1-olate (TEMPONa) to afford alkoxyaminated pyrrolidinones. The cascade proceeds through reductive amidyl radical generation with TEMPONa, 5-exo cyclization, and TEMPO trapping. No transition metal is required to perform these transformations, and complex (fused, bridged) pyrrolidinones are accessible in moderate to good yields. The product alkoxyamines are readily further converted into ketones and alcohols through either oxidation or reduction.
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Affiliation(s)
- Anirban Maity
- Organisch-Chemisches Institut, Universität Münster, 48149 Münster, Germany
| | - Armido Studer
- Organisch-Chemisches Institut, Universität Münster, 48149 Münster, Germany
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10
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Tan P, Wang S, Li G, Wang H, Zhao Z, Jiang H, Xie L, Yang L, Chen J, Zhang Z. Oxidative Cascade Iodocyclization of 1, n-Dienes: Synthesis of Iodinated Benzo[ b]azepine and Benzo[ b]azocine Derivatives. J Org Chem 2024; 89:6405-6415. [PMID: 38603543 DOI: 10.1021/acs.joc.4c00438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/13/2024]
Abstract
An oxidative cascade iodocyclization of 1,7- or 1,8-dienes has been realized under mild conditions. By employing I2 as an iodine source, this protocol provides a concise and efficient approach to a great deal of biologically significant iodinated benzo[b]azepine and benzo[b]azocine derivatives in moderate to good yields. The gram-scale synthesis and further transformation of products render the approach practical and attractive. Radical trapping and deuterium-labeling experiments help to understand the mechanism.
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Affiliation(s)
- Pengpeng Tan
- School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, P. R. China
| | - Shilong Wang
- School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, P. R. China
| | - Guiling Li
- School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, P. R. China
| | - Huichao Wang
- School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, P. R. China
| | - Ziheng Zhao
- School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, P. R. China
| | - Haochen Jiang
- School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, P. R. China
| | - Lei Xie
- School of Pharmaceutical Sciences, Liaocheng University, Liaocheng 252000, P. R. China
| | - Liru Yang
- School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, P. R. China
| | - Jinchun Chen
- School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, P. R. China
| | - Zhen Zhang
- School of Chemistry and Chemical Engineering, Yantai University, Yantai 264005, P. R. China
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11
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Fernández DF, González-Esguevillas M, Keess S, Schäfer F, Mohr J, Shavnya A, Knauber T, Blakemore DC, MacMillan DWC. Redefining the Synthetic Logic of Medicinal Chemistry. Photoredox-Catalyzed Reactions as a General Tool for Aliphatic Core Functionalization. Org Lett 2024; 26:2702-2707. [PMID: 37094230 PMCID: PMC10680136 DOI: 10.1021/acs.orglett.3c00994] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2023]
Abstract
C(sp3)-rich aliphatic motifs in drug molecules are strongly associated with clinical success. Historically, the availability of compound libraries based on C(sp3)-rich cores has been limited due to the challenging direct functionalization of aliphatic rings. Instead, most small molecule drug-like libraries are diversified around central aromatic rings. Herein, we present a general approach to the synthesis of diversified libraries featuring aliphatic core rings via photoredox catalysis under mild conditions.
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Affiliation(s)
- David F. Fernández
- Merck Center for Catalysis, Princeton University, Princeton, New Jersey 08544, United States; Pfizer Worldwide Research and Development, Pfizer Inc., Groton, Connecticut 06340, United States
| | - María González-Esguevillas
- Merck Center for Catalysis, Princeton University, Princeton, New Jersey 08544, United States; Pfizer Worldwide Research and Development, Pfizer Inc., Groton, Connecticut 06340, United States
| | - Sebastian Keess
- Merck Center for Catalysis, Princeton University, Princeton, New Jersey 08544, United States
| | - Felix Schäfer
- Merck Center for Catalysis, Princeton University, Princeton, New Jersey 08544, United States
| | - Jens Mohr
- Merck Center for Catalysis, Princeton University, Princeton, New Jersey 08544, United States
| | - Andre Shavnya
- Pfizer Worldwide Research and Development, Pfizer Inc., Groton, Connecticut 06340, United States
| | - Thomas Knauber
- Pfizer Worldwide Research and Development, Pfizer Inc., Groton, Connecticut 06340, United States
| | - David C. Blakemore
- Pfizer Worldwide Research and Development, Pfizer Inc., Groton, Connecticut 06340, United States
| | - David W. C. MacMillan
- Merck Center for Catalysis, Princeton University, Princeton, New Jersey 08544, United States
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12
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Perveen K, Bukhari NA, Alshaikh NA, Kondaveeti SB, Alsulami JA, Debnath S, Kumarasamy V. A novel front in sustainable microbial management: computational analysis of curcumin and mangiferin's synergistic action against Bacillus anthracis. Front Microbiol 2024; 15:1304234. [PMID: 38646635 PMCID: PMC11026599 DOI: 10.3389/fmicb.2024.1304234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 03/22/2024] [Indexed: 04/23/2024] Open
Abstract
Background Microorganisms are crucial in our ecosystem, offering diverse functions and adaptability. The UNGA Science Summit has underscored the importance of understanding microbes in alignment with the UN Sustainable Development Goals. Bacillus anthracis poses significant challenges among various microorganisms due to its harmful effects on both soil and public health. Our study employed computational techniques to investigate the inhibitory effects of curcumin and mangiferin on Bacillus anthracis, with the aim of presenting a novel bio-based approach to microbial management. Methods Employing high-throughput screening, we identified potential binding sites on B. anthracis. Molecular docking revealed that curcumin and mangiferin, when synergistically combined, exhibited strong binding affinities at different sites on the bacterium. Our findings demonstrated a significant drop in binding free energy, indicating a stronger interaction when these compounds were used together. Findings Results of Molecular docking indicated binding energies of -8.45 kcal/mol for mangiferin, -7.68 kcal/mol for curcumin, and a notably higher binding energy of -19.47 kcal/mol for the combination of mangiferin and curcumin with CapD protein. Molecular dynamics simulations further validated these interactions, demonstrating increased stability and structural changes in the bacterium. Conclusion This study highlights the effectiveness of natural compounds like curcumin and mangiferin in microbial management, especially against challenging pathogens like B. anthracis. It emphasizes the potential of sustainable, nature-based solutions and calls for further empirical research to expand upon these findings.
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Affiliation(s)
- Kahkashan Perveen
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Najat A. Bukhari
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Najla A. Alshaikh
- Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Suresh Babu Kondaveeti
- Department of Biochemistry, Symbiosis Medical College for Women, Symbiosis International (Deemed University), Pune, India
| | | | - Sandip Debnath
- Department of Genetics and Plant Breeding, Institute of Agriculture, Visva-Bharati University, Sriniketan, West Bengal, India
| | - Vinoth Kumarasamy
- Department of Parasitology and Medical Entomology, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur, Malaysia
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13
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Baldini L, Lenci E, Faggi C, Trabocchi A. Identification of BACE-1 inhibitors through directed C(sp 3)-H activation on 5-oxo-pyrrolidine-3-carboxylic acid derivatives. Org Biomol Chem 2024; 22:2754-2763. [PMID: 38488214 DOI: 10.1039/d3ob02117c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Convenient synthesis of stereochemically dense 5-oxo-pyrrolidines was obtained from succinic anyhdride and imines by combining the Castagnoli-Cushman reaction with directed Pd-catalyzed C(sp3)-H functionalization, taking advantage of the developing carboxylic group properly derivatized with 8-aminoquinoline as a directing group. These fully substituted 5-oxopyrrolidines were found to be able to inhibit BACE-1 enzyme with sub-micromolar activity, thanks to the interaction of the key aryl appendage introduced by C(sp3)-H activation within BACE-1 S2' subsite.
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Affiliation(s)
- Lorenzo Baldini
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 13, 50019 Sesto Fiorentino, Florence, Italy.
| | - Elena Lenci
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 13, 50019 Sesto Fiorentino, Florence, Italy.
| | - Cristina Faggi
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 13, 50019 Sesto Fiorentino, Florence, Italy.
| | - Andrea Trabocchi
- Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 13, 50019 Sesto Fiorentino, Florence, Italy.
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14
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Sahoo S, Harfmann B, Bhatia H, Singh H, Balijapelly S, Choudhury A, Stavropoulos P. A Comparative Study of Cationic Copper(I) Reagents Supported by Bipodal Tetramethylguanidinyl-Containing Ligands as Nitrene-Transfer Catalysts. ACS OMEGA 2024; 9:15697-15708. [PMID: 38585072 PMCID: PMC10993379 DOI: 10.1021/acsomega.4c00909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/28/2024] [Revised: 03/02/2024] [Accepted: 03/07/2024] [Indexed: 04/09/2024]
Abstract
The bipodal compounds [(TMG2biphenN-R)CuI-NCMe](PF6) (R = Me, Ar (4-CF3Ph-)) and [(TMG2biphenN-Me)CuI-I] have been synthesized with ligands that feature a diarylmethyl- and triaryl-amine framework and superbasic tetramethylguanidinyl residues (TMG). The cationic Cu(I) sites mediate catalytic nitrene-transfer reactions between the imidoiodinane PhI = NTs (Ts = tosyl) and a panel of styrenes in MeCN, to afford aziridines, demonstrating comparable reactivity profiles. The copper reagents have been further explored to execute C-H amination reactions with a variety of aliphatic and aromatic hydrocarbons and two distinct nitrene sources PhI = NTs and PhI = NTces (Tces = 2,2,2-trichloroethylsulfamate) in benzene/HFIP (10:2 v/v). Good yields have been obtained for sec-benzylic and tert-C-H bonds of various substrates, especially with the more electron-deficient catalyst [(TMG2biphenN-Ar)CuI-NCMe](PF6). In conjunction with earlier studies, the order of reactivity of these bipodal cationic reagents as a function of the metal employed is established as Cu > Fe > Co ≥ Mn. However, as opposed to the base-metal analogues, the bipodal Cu reagents are less reactive than a similar tripodal Cu catalyst. The observed fluorophilicity of the bipodal Cu compounds may provide a deactivation pathway.
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Affiliation(s)
- Suraj
Kumar Sahoo
- Department
of Chemistry, Missouri University of Science
and Technology, Rolla, Missouri 65409, United States
| | - Brent Harfmann
- Department
of Chemistry, Missouri University of Science
and Technology, Rolla, Missouri 65409, United States
| | - Himanshu Bhatia
- Department
of Chemistry, Missouri University of Science
and Technology, Rolla, Missouri 65409, United States
| | - Harish Singh
- Department
of Chemistry, Missouri University of Science
and Technology, Rolla, Missouri 65409, United States
| | - Srikanth Balijapelly
- Department
of Chemistry, Missouri University of Science
and Technology, Rolla, Missouri 65409, United States
| | - Amitava Choudhury
- Department
of Chemistry, Missouri University of Science
and Technology, Rolla, Missouri 65409, United States
| | - Pericles Stavropoulos
- Department
of Chemistry, Missouri University of Science
and Technology, Rolla, Missouri 65409, United States
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15
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Mansingh PP, Adhikari L, Dhara M. Pharmacognostic standardization and evaluation of antiulcer potential of Olax psittacorum leaf extract. Nat Prod Res 2024:1-9. [PMID: 38462775 DOI: 10.1080/14786419.2024.2327613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Accepted: 02/27/2024] [Indexed: 03/12/2024]
Abstract
The modern medicine has received many plants as a gift from ethnobotany. It is an efficient method of discovering new medicines. The leaves of Olax psittacorum (Lam.) Vahl. were extracted with ethanol, and the phytoconstituents present in the leaf extract were identified using Gas chromatography-mass spectrometric analysis (GC-MS), followed by determination of physico-chemical parameters and anti-ulcer properties. The leaf ethanolic extract (LEE) yield was observed to be 43.2%. The quantitative surface microscopy analysis revealed a stomatal index of 30 and 22 epidermal cells and qualitatively confirms presence of quinone, flavonoid, phenol, carbohydrate, tannin, saponin and absence of alkaloids using various screening techniques. The LEE confirms its anti-ulcer potency by inhibiting ulceration by 58% and 75% respectively, thus proving the hypothesis. These identified parameters may be helpful in developing some botanical standards for the standardisation and identification of O. psittacorum leaves with anti-ulcer properties.
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Affiliation(s)
- Pragyan Parimita Mansingh
- Department of Pharmaceutical Analysis, School of Pharmaceutical Sciences, Siksha 'O' Anusandhan University, Bhubaneswar, Odisha, India
| | - Lopamudra Adhikari
- Department of Pharmaceutical Analysis, School of Pharmaceutical Sciences, Siksha 'O' Anusandhan University, Bhubaneswar, Odisha, India
| | - Moonmun Dhara
- Department of Pharmaceutics, School of Pharmaceutical Sciences, Siksha 'O' Anusandhan University, Bhubaneswar, Odisha, India
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16
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Garcia MB, Singh M, Miller E, Neuenswander S, Douglas J, Boskovic Z. Twisted Intramolecular Charge-Transfer State Addition to Electron-Poor Olefins. J Org Chem 2024; 89:3058-3064. [PMID: 38354334 PMCID: PMC11006016 DOI: 10.1021/acs.joc.3c02521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/16/2024]
Abstract
When electron-rich arylpyrrolinium salts are irradiated with ultraviolet light in the presence of Michael acceptors, the pyrrolinyl and aryl fragments add to the activated and polarized double bond in a regioselective manner, forming two C-C bonds and fragmenting the substrate. In this paper, we present a model for this intriguing reaction, supported by spectroscopy and computational analyses, and provide evidence for rectifying previously misassigned structures. We postulate that the photochemical reaction is inefficient because the reaction between the twisted intramolecular charge-transfer state and the olefin competes with fluorescence from this state upon photon absorption. We also discuss the practical advantages of performing this photochemical reaction in a continuous flow setup. Additionally, we explore several subsequent reactions that allow us to further modify the products of the photochemical step, ultimately leading to the creation of new chemical structures.
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Affiliation(s)
- Mauricio Bahena Garcia
- Department of Medicinal Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
| | - Manvendra Singh
- Department of Medicinal Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
| | - Elizabeth Miller
- Department of Medicinal Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
| | - Sarah Neuenswander
- Nuclear Magnetic Resonance Laboratory, University of Kansas, Lawrence, Kansas 66045, United States
| | - Justin Douglas
- Nuclear Magnetic Resonance Laboratory, University of Kansas, Lawrence, Kansas 66045, United States
| | - Zarko Boskovic
- Department of Medicinal Chemistry, University of Kansas, Lawrence, Kansas 66045, United States
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17
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Purakkel U, Praveena G, Madabhushi VY, Jadav SS, Prakasham RS, Dasugari Varakala SG, Sriram D, Blanch EW, Maniam S. Thiazolotriazoles As Anti-infectives: Design, Synthesis, Biological Evaluation and In Silico Studies. ACS OMEGA 2024; 9:8846-8861. [PMID: 38434818 PMCID: PMC10905600 DOI: 10.1021/acsomega.3c06324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 12/03/2023] [Accepted: 12/14/2023] [Indexed: 03/05/2024]
Abstract
The rational design of novel thiazolo[2,3-c][1,2,4]triazole derivatives was carried out based on previously identified antitubercular hit molecule H127 for discovering potent compounds showing antimicrobial activity. The designed compounds were screened for their binding efficacies against the antibacterial drug target enoyl-[acyl-carrier-protein] reductase, followed by prediction of drug-likeness and ADME properties. The designed analogues were chemically synthesized, characterized by spectroscopic techniques, followed by evaluation of antimicrobial activity against bacterial and fungal strains, as well as antitubercular activity against M. tuberculosis and M. bovis strains. Among the synthesized compounds, five compounds, 10, 11, 35, 37 and 38, revealed antimicrobial activity, albeit with differential potency against various microbial strains. Compounds 10 and 37 were the most active against S. mutans (MIC: 8 μg/mL), while compounds 11 and 37 showed the highest activity against B. subtillis (MIC: 16 μg/mL), whereas compounds 10, 11 and 37 displayed activities against E. coli (MIC: 16 μg/mL). Meanwhile, compounds 10 and 35 depicted activities against S. typhi (MIC: 16 μg/mL) and compound 10 showed antifungal activity against C. albicans (MIC: 32 μg/mL). The current study has identified two broad-spectrum antibacterial hit compounds (10 and 37). Further structural investigation on these molecules is underway to enhance their potency.
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Affiliation(s)
- Umadevi
Kizhakke Purakkel
- Applied
Chemistry and Environmental Science, STEM College, RMIT University, Melbourne, Victoria 3001, Australia
- Organic
Synthesis and Process Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Ganji Praveena
- Organic
Synthesis and Process Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Valli Y. Madabhushi
- Organic
Synthesis and Process Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | - Surender Singh Jadav
- Department
of Natural Products and Medicinal Chemistry, CSIR-Indian Institute of Chemical Technology Tarnaka, Uppal Road, Hyderabad 500037, India
- Academy
of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Reddy Shetty Prakasham
- Organic
Synthesis and Process Chemistry Division, CSIR-Indian Institute of Chemical Technology, Hyderabad 500007, India
| | | | - Dharmarajan Sriram
- Department
of Pharmacy, Birla Institute of Technology
& Science Pilani, Hyderabad Campus, Hyderabad 500078, India
| | - Ewan W. Blanch
- Applied
Chemistry and Environmental Science, STEM College, RMIT University, Melbourne, Victoria 3001, Australia
| | - Subashani Maniam
- Applied
Chemistry and Environmental Science, STEM College, RMIT University, Melbourne, Victoria 3001, Australia
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18
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Sangsuwan W, Faikhruea K, Supabowornsathit K, Sangsopon D, Ingrungruanglert P, Chuntakaruk H, Nuntavanotayan N, Nakprasit K, Israsena N, Rungrotmongkol T, Chuawong P, Vilaivan T, Aonbangkhen C. Design, Synthesis, and Characterization of Novel Styryl Dyes as Fluorescent Probes for Tau Aggregate Detection in Vitro and in Cells. Chem Asian J 2024:e202301081. [PMID: 38377056 DOI: 10.1002/asia.202301081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 02/14/2024] [Accepted: 02/19/2024] [Indexed: 02/22/2024]
Abstract
A series of novel styryl dye derivatives incorporating indolium and quinolinium core structures were successfully synthesized to explore their interacting and binding capabilities with tau aggregates in vitro and in cells. The synthesized dyes exhibited enhanced fluorescence emission in viscous environments due to the rotatable bond confinement in the core structure. Dye 4, containing a quinolinium moeity and featuring two cationic sites, demonstrated a 28-fold increase in fluorescence emission upon binding to tau aggregates. This dye could also stain tau aggregates in living cells, confirmed by cell imaging using confocal fluorescence microscopy. A molecular docking study was conducted to provide additional visualization and support for binding interactions. This work offers novel and non-cytotoxic fluorescent probes with desirable photophysical properties, which could potentially be used for studying tau aggregates in living cells, prompting further development of new fluorescent probes for early Alzheimer's disease detection.
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Affiliation(s)
- Withsakorn Sangsuwan
- Center of Excellence in Natural Products Chemistry (CENP), Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
- Department of Chemistry and, Center of Excellence for Innovation in Chemistry, Faculty of Science, Special Research Unit for Advanced Magnetic Resonance (AMR), Kasetsart University, Bangkok, 10900, Thailand
| | - Kriangsak Faikhruea
- Organic Synthesis Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Kotchakorn Supabowornsathit
- Organic Synthesis Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Don Sangsopon
- Center of Excellence in Natural Products Chemistry (CENP), Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Praewphan Ingrungruanglert
- Stem Cell and Cell Therapy Research Unit and Department of Pharmacology, Faculty of Medicine, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Hathaichanok Chuntakaruk
- Program in Bioinformatics and Computational Biology, Graduate School, Chulalongkorn University, Bangkok, 10330, Thailand
- Center of Excellence in Structural and Computational Biology, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Napatsaporn Nuntavanotayan
- Department of Chemistry and, Center of Excellence for Innovation in Chemistry, Faculty of Science, Special Research Unit for Advanced Magnetic Resonance (AMR), Kasetsart University, Bangkok, 10900, Thailand
| | - Kittiporn Nakprasit
- Center of Excellence in Natural Products Chemistry (CENP), Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Nipan Israsena
- Stem Cell and Cell Therapy Research Unit and Department of Pharmacology, Faculty of Medicine, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Thanyada Rungrotmongkol
- Program in Bioinformatics and Computational Biology, Graduate School, Chulalongkorn University, Bangkok, 10330, Thailand
- Center of Excellence in Structural and Computational Biology, Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Pitak Chuawong
- Department of Chemistry and, Center of Excellence for Innovation in Chemistry, Faculty of Science, Special Research Unit for Advanced Magnetic Resonance (AMR), Kasetsart University, Bangkok, 10900, Thailand
| | - Tirayut Vilaivan
- Organic Synthesis Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
| | - Chanat Aonbangkhen
- Center of Excellence in Natural Products Chemistry (CENP), Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, 10330, Thailand
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19
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Lee H, Nam H, Lee SY. Enantio- and Diastereoselective Variations on α-Iminonitriles: Harnessing Chiral Cyclopropenimine-Thiourea Organocatalysts. J Am Chem Soc 2024; 146:3065-3074. [PMID: 38281151 DOI: 10.1021/jacs.3c09911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
Chiral 1-pyrrolines containing a nitrile motif serve as crucial structural scaffolds in biologically active molecules and exhibit diversity as building blocks owing to their valuable functional groups; however, the asymmetric synthesis of such compounds remains largely unexplored. Herein, we present an enantio- and diastereoselective method for the synthesis of α-chiral nitrile-containing 1-pyrroline derivatives bearing vicinal stereocenters through the design and introduction of chiral cyclopropenimine-based bifunctional catalysts featuring a thiourea moiety. This synthesis entails a highly stereoselective conjugate addition of α-iminonitriles to a wide array of enones, followed by cyclocondensation, thereby affording a series of cyanopyrroline derivatives, some of which contain all-carbon quaternary centers. Moreover, we demonstrate the synthetic utility of this strategy by performing a gram-scale reaction with 1% catalyst loading, along with a variety of chemoselective transformations of the product, including the synthesis of a vildagliptin analogue. Finally, we showcase the selective synthesis of all four stereoisomers of the cyanopyrroline products through trans-to-cis isomerization, highlighting the versatility of our approach.
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Affiliation(s)
- Hooseung Lee
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Hyeongwoo Nam
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Sarah Yunmi Lee
- Department of Chemistry, Yonsei University, Seoul 03722, Republic of Korea
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20
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Shit S, Choudhury C, Saikia AK. Nitrile stabilized synthesis of pyrrolidine and piperidine derivatives via tandem alkynyl aza-Prins-Ritter reactions. Org Biomol Chem 2024; 22:568-578. [PMID: 38117142 DOI: 10.1039/d3ob01764h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
An efficient methodology for the synthesis of N-(pyrrolidine-3-ylidenemethyl)acetamides mediated by triflic acid in good yields with separable Z/E isomers within a short reaction time has been demonstrated. The reaction involves the initial formation of the pyrrolidin-3-ylidenemethylium carbocation via the Prins cyclization reaction followed by the Ritter reaction to produce N-(pyrrolidine-3-ylidenemethyl)acetamides. This methodology is also used for the synthesis of their piperidine derivatives.
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Affiliation(s)
- Sudip Shit
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
| | - Chinmayee Choudhury
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
| | - Anil K Saikia
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
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21
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Singh P, Min J, Min S, Moon K, Kim HS, Kim IS. Sulfur-Directed α-C(sp 3)-H Amidation of Pyrrolidines with Dioxazolones under Rhodium Catalysis. Org Lett 2024; 26:57-61. [PMID: 38134331 DOI: 10.1021/acs.orglett.3c03633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2023]
Abstract
Site-selective functionalization of saturated N-heterocycles such as pyrrolidines is a central topic in organic synthesis and drug discovery. We herein report the sulfur-assisted rhodium(III)-catalyzed sp3 C-H amidation of pyrrolidines with dioxazolones as amidating agents. The amenability of the thioamide directing group is elucidated by a series of control experiments.
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Affiliation(s)
- Pargat Singh
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Jeonghyun Min
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Sujin Min
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Kyeongwon Moon
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - Hyung Sik Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
| | - In Su Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea
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22
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Li G, Shi S, Qian J, Norton JR, Xu GX, Liu JR, Hong X. Kinetics of H· Transfer from CpCr(CO) 3H to Various Enamides: Application to Construction of Pyrrolidines. JACS AU 2023; 3:3366-3373. [PMID: 38155656 PMCID: PMC10751771 DOI: 10.1021/jacsau.3c00529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 11/06/2023] [Accepted: 11/07/2023] [Indexed: 12/30/2023]
Abstract
The rate constants kH (kD) have been determined at 27 °C for H· (D·) transfer from CpCr(CO)3H(D) to the C=C bonds of various enamides. This process leads to the formation of α-amino radicals. Vinyl enamides with N-alkyl and N-phenyl substituents have proven to be good H· acceptors, with rate constants close to those of styrene and methyl methacrylate. A methyl substituent on the incipient radical site decreases kH by a factor of 4; a methyl substituent on the carbon that will receive the H· decreases kH by a factor of 380. The measured kH values indicate that these α-amino radicals can be used for the cyclization of enamides to pyrrolidines. A vanadium hydride, HV(CO)4(dppe), has proven more effective at the cyclization of enamides than Cr or Co hydrides-presumably because the weakness of the V-H bond leads to faster H· transfer. The use of the vanadium hydride is operationally simple, employs mild reaction conditions, and has a broad substrate scope. Calculations have confirmed that H· transfer is the slowest step in these cyclization reactions.
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Affiliation(s)
- Guangchen Li
- Department
of Chemistry, Columbia University, 3000 Broadway, New York, New York 10027, United States
| | - Shicheng Shi
- Department
of Chemistry, Columbia University, 3000 Broadway, New York, New York 10027, United States
| | - Jin Qian
- Department
of Chemistry, Columbia University, 3000 Broadway, New York, New York 10027, United States
| | - Jack R. Norton
- Department
of Chemistry, Columbia University, 3000 Broadway, New York, New York 10027, United States
| | - Guo-Xiong Xu
- Center
of Chemistry for Frontier Technologies, Department of Chemistry, State
Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
| | - Ji-Ren Liu
- Center
of Chemistry for Frontier Technologies, Department of Chemistry, State
Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
| | - Xin Hong
- Center
of Chemistry for Frontier Technologies, Department of Chemistry, State
Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
- Beijing
National Laboratory for Molecular Sciences, Zhongguancun North First Street No. 2, Beijing 100190, P.R. China
- Key
Laboratory of Precise Synthesis of Functional Molecules of Zhejiang
Province, School of Science, Westlake University, 18 Shilongshan Road, Hangzhou 310024, Zhejiang Province , China
- State
Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005, P.R. China
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23
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Matador E, Tilby MJ, Saridakis I, Pedrón M, Tomczak D, Llaveria J, Atodiresei I, Merino P, Ruffoni A, Leonori D. A Photochemical Strategy for the Conversion of Nitroarenes into Rigidified Pyrrolidine Analogues. J Am Chem Soc 2023; 145:27810-27820. [PMID: 38059920 DOI: 10.1021/jacs.3c10863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/08/2023]
Abstract
Bicyclic amines are important motifs for the preparation of bioactive materials. These species have well-defined exit vectors that enable accurate disposition of substituents toward specific areas of chemical space. Of all possible skeletons, the 2-azabicyclo[3.2.0]heptane framework is virtually absent from MedChem libraries due to a paucity of synthetic methods for its preparation. Here, we report a modular synthetic strategy that utilizes nitroarenes as flat and easy-to-functionalize feedstocks for the assembly of these sp3-rich materials. Mechanistically, this approach exploits two concomitant photochemical processes that sequentially ring-expand the nitroarene into an azepine and then fold it into a rigid bicycle pyrroline by means of singlet nitrene-mediated nitrogen insertion and excited-state-4π electrocyclization. A following hydrogenolysis provides, with full diastereocontrol, the desired bicyclic amine derivatives whereby the aromatic substitution pattern has been translated into the one of the three-dimensional heterocycle. These molecules can be considered rigid pyrrolidine analogues with a well-defined orientation of their substituents. Furthermore, unsupervised clustering of an expansive virtual database of saturated N-heterocycles revealed these derivatives as effective isosteres of rigidified piperidines. Overall, this platform enables the conversion of nitroarene feedstocks into complex sp3-rich heterocycles of potential interest to drug development.
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Affiliation(s)
- Esteban Matador
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
- Departamento de Química Orgánica, Universidad de Sevilla and Centro de Innovación en Química Avanzada (ORFEO-CINQA), C/Prof. García González 1, 41012 Sevilla, Spain
| | - Michael J Tilby
- Department of Chemistry, University of Manchester, M13 9PL Manchester, U.K
| | - Iakovos Saridakis
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Manuel Pedrón
- Institute of Biocomputation and Physics of Complex Systems (BIFI), University of Zaragoza, 50009 Zaragoza, Spain
| | - Dawid Tomczak
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Josep Llaveria
- Global Discovery Chemistry, Therapeutics Discovery, Janssen Research & Development, Janssen Research & Development, Janssen-Cilag S.A., Jarama 75A, 45007 Toledo, Spain
| | - Iuliana Atodiresei
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Pedro Merino
- Institute of Biocomputation and Physics of Complex Systems (BIFI), University of Zaragoza, 50009 Zaragoza, Spain
| | - Alessandro Ruffoni
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Daniele Leonori
- Institute of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
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24
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Borozdenko DA, Gonchar DI, Bogorodova VI, Tarasenko DV, Kramarova EP, Khovanova SS, Golubev YV, Kiseleva NM, Shmigol TA, Ezdoglian AA, Sobyanin KA, Negrebetsky VV, Baukov YI. The Antidepressant Activity of a Taurine-Containing Derivative of 4-Phenylpyrrolidone-2 in a Model of Chronic Unpredictable Mild Stress. Int J Mol Sci 2023; 24:16564. [PMID: 38068887 PMCID: PMC10705968 DOI: 10.3390/ijms242316564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 11/14/2023] [Accepted: 11/18/2023] [Indexed: 12/18/2023] Open
Abstract
This study investigates the therapeutic potential of a new compound, potassium 2-[2-(2-oxo-4-phenylpyrrolidin-1-yl) acetamido]ethanesulfonate (Compound I), in depression. Willner's chronic unpredictable mild stress model of male Wistar rats was used as a depression model. The rats were randomized into four groups, including an intact group, a Compound I group, a Fluoxetine group, and a control group with saline. Behavioral tests, such as the Porsolt forced swim test, hole-board test, elevated plus maze test, and light-dark box, were used to assess the animals' conditions. Our results demonstrated that Compound I effectively reduced the immobilization time of rats in the forced swim test, increased orientation and exploratory behavior, and decreased the latency period of going into the dark compartment compared to the control group. Hippocampal and striatal serotonin concentrations were increased in the Compound I group, and the compound also reduced the level of corticosterone in the blood plasma of rats compared to the intact animals. These results suggest that Compound I has reliable antidepressant activity, comparable to that of the reference antidepressant Fluoxetine.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | - Yuri I. Baukov
- Institute of Pharmacy and Medicinal Chemistry, Pirogov Russian National Research Medical University, 117997 Moscow, Russia; (D.A.B.); (D.I.G.); (V.I.B.); (D.V.T.); (E.P.K.); (S.S.K.); (Y.V.G.); (N.M.K.); (T.A.S.); (A.A.E.); (K.A.S.); (V.V.N.)
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25
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Huang J, Wu Y, Hu Z, Han S, Rong L, Xie X, Chen W, Peng X. Mn(OAc) 2-promoted [3+2] cyclization of enaminone with isocyanoacetate: Rapid access to pyrrole-2-carboxylic ester derivatives with potent anticancer activity. Bioorg Chem 2023; 140:106748. [PMID: 37562314 DOI: 10.1016/j.bioorg.2023.106748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2023] [Revised: 07/15/2023] [Accepted: 07/20/2023] [Indexed: 08/12/2023]
Abstract
The practical and facile Mn(OAc)2-promoted [3+2] cycloaddition reaction of enaminones with isocyanoacetate was developed, that delivered a diversity of 3-aroyl pyrrole-2-carboxylic esters with broad substrates scope. The most of the newly synthesized compounds exhibit moderate antiproliferative activity against four cancer cells. Notably, compound 2n demonstrate the most potent activity with average IC50 values of 5.61 μM against four distinct cancer cell lines. Moreover, 2n exhibit favorable anti-migration activity and drug-like properties. The further investigation suggests that compound 2n possesses the ability to inhibit ERK5 activity and exhibits effective binding with the ERK5 protein, making it a promising candidate as a lead compound for a new class of ERK5 inhibitors discovery.
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Affiliation(s)
- Jiuzhong Huang
- School of Pharmacy, Gannan Medical University, Ganzhou 341000, PR China
| | - Yi Wu
- Key Laboratory of Prevention and Treatment of Cardiovascular and Cerebrovascular Diseases of Ministry of Education, Gannan Medical University, Ganzhou 341000, PR China
| | - Zhihao Hu
- School of Pharmacy, Gannan Medical University, Ganzhou 341000, PR China
| | - Shihong Han
- School of Pharmacy, Gannan Medical University, Ganzhou 341000, PR China
| | - Lanlan Rong
- School of Pharmacy, Gannan Medical University, Ganzhou 341000, PR China
| | - Xin Xie
- School of Pharmacy, Gannan Medical University, Ganzhou 341000, PR China
| | - Weiming Chen
- School of Pharmacy, Gannan Medical University, Ganzhou 341000, PR China.
| | - Xiaopeng Peng
- School of Pharmacy, Gannan Medical University, Ganzhou 341000, PR China.
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26
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Zhu H, Zhao HY, Peng C, Shu HZ, Liu ZH, Zhou QM, Xiong L. New indolizidine- and pyrrolidine-type alkaloids with anti-angiogenic activities from Anisodus tanguticus. Biomed Pharmacother 2023; 167:115481. [PMID: 37703664 DOI: 10.1016/j.biopha.2023.115481] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Revised: 09/06/2023] [Accepted: 09/07/2023] [Indexed: 09/15/2023] Open
Abstract
Eleven alkaloids, including five previously undescribed indolizidine alkaloids (1, 2a, 2b, 3a, and 3b) and four new pyrrolidine alkaloids (5-8), were isolated from the roots of Anisodus tanguticus. Of these, two new pairs of enantiomeric alkaloids (2a/2b and 3a/3b) are the first examples of alkaloids containing both indolizidine and pyrrolidine structural fragments. The one-carbon bridge connections with two pyrrolidine rings (6) or with a pyrrolidine ring and a pyridine ring (8) are the first reported from nature. Extensive spectroscopic techniques were used to elucidate their structures, and NMR and ECD calculations were used to determine the absolute configurations. The viability of human umbilical vein endothelial cells (HUVECs) was inhibited by compounds 2a, 2b, 3a, 4b, and 5, and compound 2b exhibited a potential anti-angiogenic effect by inhibiting the proliferation, migration, and tube formation of HUVECs. A chorioallantoic membrane assay also demonstrated the anti-angiogenic activity of 2b. In addition, compounds 2a, 2b, 3a, and 4b exhibited moderate cytotoxicity against A2780 cells.
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Affiliation(s)
- Huan Zhu
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; Institute of Innovative Medicine Ingredients of Southwest Specialty Medicinal Materials, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Hao-Yu Zhao
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; Institute of Innovative Medicine Ingredients of Southwest Specialty Medicinal Materials, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Cheng Peng
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Hong-Zhen Shu
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; Institute of Innovative Medicine Ingredients of Southwest Specialty Medicinal Materials, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
| | - Zhao-Hua Liu
- Chengdu No.1 Pharmaceutical Co. Ltd., Chengdu 610031, China
| | - Qin-Mei Zhou
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; Institute of Innovative Medicine Ingredients of Southwest Specialty Medicinal Materials, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
| | - Liang Xiong
- State Key Laboratory of Southwestern Chinese Medicine Resources, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China; Institute of Innovative Medicine Ingredients of Southwest Specialty Medicinal Materials, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China.
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27
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Kroņkalne R, Beļaunieks RD, Ubaidullajevs A, Mishnev A, Turks MR. 1,2-Silyl Shift-Induced Heterocyclization of Propargyl Silanes: Synthesis of Five-Membered Heterocycles Containing a Functionalized Olefin Side Chain. J Org Chem 2023; 88:13857-13870. [PMID: 37738089 DOI: 10.1021/acs.joc.3c01481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/23/2023]
Abstract
Propargyl silanes with a terminal alkyne moiety undergo a 1,2-silyl shift when activated with electrophiles such as H+, Br+, I+, and PhSe+. A method was developed to trap 1,3-transposed electrophilic centers with various internal O-, N-, and S-nucleophiles in a 5-exo manner. This synthetic procedure provided five-membered heterocycles containing a trisubstituted olefin side chain. The scope of the method includes access to tetrahydrofuran, γ-butyrolactone, 2-isooxazoline, pyrrolidine, and thiolane derivatives in yields ranging from 25 to 85% (23 examples in total). Reactions with TsNBr2 ensured complete (E)-selectivity of the newly formed olefins. Further functionalization of the obtained 1-trialkylsilyl-2-bromovinyl side chain was demonstrated by double-bond geometry-preserving electrophilic substitution and cross-coupling reactions that provided heterocycles with a trisubstituted vinyl moiety.
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Affiliation(s)
- Rasma Kroņkalne
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena str. 3, Riga LV-1048, Latvia
| | - Ru Dolfs Beļaunieks
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena str. 3, Riga LV-1048, Latvia
| | - Artjoms Ubaidullajevs
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena str. 3, Riga LV-1048, Latvia
| | - Anatoly Mishnev
- Latvian Institute of Organic Synthesis, Aizkraukles 21, Riga LV-1006, Latvia
| | - Ma Ris Turks
- Institute of Technology of Organic Chemistry, Faculty of Materials Science and Applied Chemistry, Riga Technical University, Paula Valdena str. 3, Riga LV-1048, Latvia
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28
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Poyraz S, Döndaş HA, Döndaş NY, Sansano JM. Recent insights about pyrrolidine core skeletons in pharmacology. Front Pharmacol 2023; 14:1239658. [PMID: 37745071 PMCID: PMC10512268 DOI: 10.3389/fphar.2023.1239658] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 07/05/2023] [Indexed: 09/26/2023] Open
Abstract
To overcome numerous health disorders, heterocyclic structures of synthetic or natural origin are utilized, and notably, the emergence of various side effects of existing drugs used for treatment or the resistance of disease-causing microorganisms renders drugs ineffective. Therefore, the discovery of potential therapeutic agents that utilize different modes of action is of utmost significance to circumvent these constraints. Pyrrolidines, pyrrolidine-alkaloids, and pyrrolidine-based hybrid molecules are present in many natural products and pharmacologically important agents. Their key roles in pharmacotherapy make them a versatile scaffold for designing and developing novel biologically active compounds and drug candidates. This review aims to provide an overview of recent advancements (especially during 2015-2023) in the exploration of pyrrolidine derivatives, emphasizing their significance as fundamental components of the skeletal structure. In contrast to previous reviews that have predominantly focused on a singular biological activity associated with these molecules, this review consolidates findings from various investigations encompassing a wide range of important activities (antimicrobial, antiviral, anticancer, anti-inflammatory, anticonvulsant, cholinesterase inhibition, and carbonic anhydrase inhibition) exhibited by pyrrolidine derivatives. This study is also anticipated to serve as a valuable resource for drug research and development endeavors, offering significant insights and guidance.
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Affiliation(s)
- Samet Poyraz
- Department of Basic Pharmaceutical Sciences, Faculty of Pharmacy, Çukurova University, Adana, Türkiye
| | - H. Ali Döndaş
- Department of Basic Pharmaceutical Sciences, Faculty of Pharmacy, Çukurova University, Adana, Türkiye
- Department of Biotechnology, Institute of Natural and Applied Sciences, Çukurova University, Adana, Türkiye
| | | | - José M. Sansano
- Department of Organic Chemistry, Centro de Innovación en Química Avanzada (ORFEO-CINQA), Instituto de Síntesis Orgánica (ISO), University of Alicante, Alicante, Spain
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29
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Nakagawa H, Fuwa H. Au-catalyzed stereodivergent synthesis of 2,5-disubstituted pyrrolidines: total synthesis of (+)-monomorine I and (+)-indolizidine 195B. Chem Commun (Camb) 2023; 59:10121-10124. [PMID: 37483107 DOI: 10.1039/d3cc02453a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/25/2023]
Abstract
Stereodivergent synthesis of 2,5-disubstituted pyrrolidines was achieved via a Au-catalyzed tandem intramolecular alkyne hydroamination/iminium formation/Et3SiH reduction. Importantly, the stereochemical outcome could be switched by choosing an appropriate nitrogen protecting group. Total synthesis of a diastereomeric pair of alkaloid natural products, monomorine I and indolizidine 195B, was achieved to showcase the synthetic utility of the tandem reaction.
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Affiliation(s)
- Hayato Nakagawa
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan.
| | - Haruhiko Fuwa
- Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University, 1-13-27 Kasuga, Bunkyo-ku, Tokyo 112-8551, Japan.
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30
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Gharpure SJ, Patel RK, Gupta KS. Total Synthesis of Pyrrolidine and Piperidine Natural Products via TMSOTf-Mediated "5/6- endo-dig" Reductive Hydroamination of Enynyl Amines. Org Lett 2023; 25:5850-5855. [PMID: 37527209 DOI: 10.1021/acs.orglett.3c02115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
Stereoselective syntheses of pyrrolidines and piperidines bearing hydrophobic chains have been achieved through a metal free, Lewis acid-mediated 5/6-endo-dig reductive hydroamination cascade of enynyl amines. The brevity of the developed strategy allowed for the collective stereoselective total synthesis of various alkaloids, including (±)-pyrrolidine cis-225H, (±)-epi-197B, (±)-epi-225C, the family of (+)-solenopsins and (+)-isosolenopsins, and the formal synthesis of (±)-bgugaine and (+)-azimic acid.
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Affiliation(s)
- Santosh J Gharpure
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Raj K Patel
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Krishna S Gupta
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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31
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Park Y, Ryu JS. Sulfamidate-Based Stereoselective Total Synthesis of (+)-Preussin Using Gold(I)-Catalyzed Intramolecular Dehydrative Amination: Dead End and Detour. J Org Chem 2023. [PMID: 37392432 DOI: 10.1021/acs.joc.3c00670] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/03/2023]
Abstract
A sulfamidate-based stereoselective total synthesis of (+)-preussin has been developed. The key step involves a gold(I)-catalyzed intramolecular dehydrative amination of sulfamate esters tethered to allylic alcohols, which allows for the construction of the cyclic sulfamidate with high stereoselectivity. Further manipulation to highly constrained bicyclic sulfamidate and the following ring-opening process afford 3-hydroxypyrrolidine motif stereoselectively. The energy of the constrained bicyclic ring system is relieved by the subsequent ring-opening process, which leads to a stereoselective formation of the 3-hydroxypyrrolidine motif under mild reaction conditions. The success of this approach not only provides a new method for the total synthesis of enantiomerically pure (+)-preussin but also highlights the synthetic utility of sulfamidates in constructing valuable natural product architectures.
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Affiliation(s)
- Yunjeong Park
- College of Pharmacy and Graduate School of Pharmaceutical Sciences, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Jae-Sang Ryu
- College of Pharmacy and Graduate School of Pharmaceutical Sciences, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
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32
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Heckmann CM, Paul CE. Enantio-Complementary Synthesis of 2-Substituted Pyrrolidines and Piperidines via Transaminase-Triggered Cyclizations. JACS AU 2023; 3:1642-1649. [PMID: 37388678 PMCID: PMC10301811 DOI: 10.1021/jacsau.3c00103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/21/2023] [Accepted: 04/21/2023] [Indexed: 07/01/2023]
Abstract
Chiral N-heterocycles are a common motif in many active pharmaceutical ingredients; however, their synthesis often relies on the use of heavy metals. In recent years, several biocatalytic approaches have emerged to reach enantiopurity. Here, we describe the asymmetric synthesis of 2-substituted pyrrolidines and piperidines, starting from commercially available ω-chloroketones by using transaminases, which has not yet been comprehensively studied. Analytical yields of up to 90% and enantiomeric excesses of up to >99.5% for each enantiomer were achieved, which has not previously been shown for bulky substituents. This biocatalytic approach was applied to synthesize (R)-2-(p-chlorophenyl)pyrrolidine on a 300 mg scale, affording 84% isolated yield, with >99.5% ee.
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33
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Larduinat M, François J, Jacolot M, Popowycz F. Ir-Catalyzed Synthesis of Functionalized Pyrrolidines and Piperidines Using the Borrowing Hydrogen Methodology. J Org Chem 2023. [PMID: 37134228 DOI: 10.1021/acs.joc.3c00329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
The Ir(III)-catalyzed synthesis of 3-pyrrolidinols and 4-piperidinols combining 1,2,4-butanetriol or 1,3,5-pentanetriol with primary amines was carried out. This borrowing hydrogen methodology was further extended to the sequential diamination of triols leading to amino-pyrrolidines and amino-piperidines.
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Affiliation(s)
- Malvina Larduinat
- Univ Lyon, INSA Lyon, Université Lyon 1, CNRS, CPE Lyon, UMR 5246, ICBMS, 1 rue Victor Grignard, 69621 Villeurbanne Cedex, France
| | - Jordan François
- Univ Lyon, INSA Lyon, Université Lyon 1, CNRS, CPE Lyon, UMR 5246, ICBMS, 1 rue Victor Grignard, 69621 Villeurbanne Cedex, France
| | - Maïwenn Jacolot
- Univ Lyon, INSA Lyon, Université Lyon 1, CNRS, CPE Lyon, UMR 5246, ICBMS, 1 rue Victor Grignard, 69621 Villeurbanne Cedex, France
| | - Florence Popowycz
- Univ Lyon, INSA Lyon, Université Lyon 1, CNRS, CPE Lyon, UMR 5246, ICBMS, 1 rue Victor Grignard, 69621 Villeurbanne Cedex, France
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34
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Younus Wani M, Saeed Saleh Alghamidi M, Srivastava V, Ahmad A, Aqlan FM, Saad Al-Bogami A. Click synthesis of pyrrolidine-based 1,2,3-triazole derivatives as antifungal agents causing cell cycle arrest and apoptosis in Candida auris. Bioorg Chem 2023; 136:106562. [PMID: 37119782 DOI: 10.1016/j.bioorg.2023.106562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Revised: 04/17/2023] [Accepted: 04/19/2023] [Indexed: 05/01/2023]
Abstract
The emergence of multidrug-resistant fungal pathogens such as Candida auris is one of the major reasons WHO has declared fungal infections as a public health threat. Multidrug resistance, high mortality rates, frequent misidentification, and involvement in hospital outbreaks of this fungus demand the development of novel therapeutic drugs. In this direction, we report the synthesis of novel pyrrolidine-based 1,2,3-triazole derivatives using Click Chemistry (CC) and evaluation of their antifungal susceptibility against C. auris following Clinical and Laboratory Standards Institute (CLSI) guidelines. The fungicidal activity of the most potent derivative (P6) was further quantitatively confirmed by the MUSE cell viability assay. For insight mechanisms, the effect of the most active derivative on cell cycle arrest was studied using MuseTM Cell Analyzer and apoptotic mode of cell death was determined by studying phosphatidylserine externalization and mitochondrial depolarization. In vitro susceptibility testing and viability assays showed that all the newly synthesized compounds have antifungal activity with P6 being the most potent derivative. Cell cycle analysis revealed that P6 arrested the cells in S-phase in a concentration dependent manner and the apoptotic mode of cell death was confirmed by the movement of cytochrome c from mitochondria to cytosol with membrane depolarization. The hemolytic assay confirmed the safe use of P6 for further in vivo studies.
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Affiliation(s)
- Mohmmad Younus Wani
- Department of Chemistry, College of Science, University of Jeddah, 21589 Jeddah, Saudi Arabia.
| | | | - Vartika Srivastava
- Department of Clinical Microbiology and Infectious Diseases, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, South Africa
| | - Aijaz Ahmad
- Department of Clinical Microbiology and Infectious Diseases, School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, South Africa; Infection Control, Charlotte Maxeke Johannesburg Academic Hospital National Health Laboratory Service, South Africa
| | - Faisal M Aqlan
- Department of Chemistry, College of Science, University of Jeddah, 21589 Jeddah, Saudi Arabia
| | - Abdullah Saad Al-Bogami
- Department of Chemistry, College of Science, University of Jeddah, 21589 Jeddah, Saudi Arabia
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35
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Ismail MA, Abusaif MS, El-Gaby MSA, Ammar YA, Ragab A. A new class of anti-proliferative activity and apoptotic inducer with molecular docking studies for a novel of 1,3-dithiolo[4,5- b]quinoxaline derivatives hybrid with a sulfonamide moiety. RSC Adv 2023; 13:12589-12608. [PMID: 37101951 PMCID: PMC10123497 DOI: 10.1039/d3ra01635h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2023] [Accepted: 04/10/2023] [Indexed: 04/28/2023] Open
Abstract
A new series of 6-(pyrrolidin-1-ylsulfonyl)-[1,3]dithiolo[4,5-b]quinoxaline-2-ylidines 10a-f, 12, 14, 16, and 18 were designed, synthesized, and evaluated for their in vitro anticancer activity. The structures of the novel compounds were systematically characterized by 1H NMR, 13C NMR, and elemental analysis. The synthesized derivatives were evaluated for their in vitro antiproliferative activity against three human cancer cell lines (HepG-2, HCT-116, and MCF-7) with more sensitivity to MCF-7. Moreover, three derivatives 10c, 10f, and 12 were the most promising candidates with sub-micromole values. These derivatives were further evaluated against MDA-MB-231, and the results displayed significant IC50 values ranging from 2.26 ± 0.1 to 10.46 ± 0.8 μM and showed low cellular cytotoxicity against WI-38. Surprisingly, the most active derivative 12 revealed sensitivity towards the breast cell lines MCF-7 (IC50 = 3.82 ± 0.2 μM) and MDA-MB-231 (IC50 = 2.26 ± 0.1 μM) compared with doxorubicin (IC50 = 4.17 ± 0.2 and 3.18 ± 0.1 M). Cell cycle analysis showed that compound 12 arrests and inhibits the growth of MCF-7 cells in the S phase with values of 48.16% compared with the untreated control 29.79% and exhibited a significantly higher apoptotic effect in MCF-7 with a value of 42.08% compared to control cell at 1.84%. Furthermore, compound 12 decreased Bcl-2 protein 0.368-fold and activation on pro-apoptotic genes Bax and P53 by 3.97 and 4.97 folds, respectively, in MCF-7 cells. Compound 12 exhibited higher inhibitory activity to EGFRWt, EGFRL858R, and VEGFR-2 with IC50 values (0.19 ± 0.009, 0.026 ± 0.001, and 0.42 ± 0.021 μM) compared with erlotinib (IC50 = 0.037 ± 0.002 and 0.026 ± 0.001 μM) and sorafenib (IC50 = 0.035 ± 0.002 μM). Finally, in silico ADMET prediction presented that 1,3-dithiolo[4,5-b]quinoxaline derivative 12 obeys the Lipinski rule of five and the Veber rule with no PAINs alarms and moderately soluble properties. Additionally, toxicity prediction revealed that compound 12 demonstrated inactivity to hepatotoxic carcinogenicity, immunotoxicity, mutagenicity, and cytotoxicity. Moreover, molecular docking studies showed good binding affinity with lower binding energy inside the active site of Bcl-2 (PDB: 4AQ3), EGFR (PDB: 1M17), and VEGFR (PDB: 4ASD).
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Affiliation(s)
- Mostafa A Ismail
- Chemistry Department, Faculty of Science, Al-Azhar University Assiut 71524 Egypt
| | - Moustafa S Abusaif
- Chemistry Department, Faculty of Science (Boys), Al-Azhar University Nasr City Cairo 11884 Egypt
| | - Mohamed S A El-Gaby
- Chemistry Department, Faculty of Science (Boys), Al-Azhar University Nasr City Cairo 11884 Egypt
| | - Yousry A Ammar
- Chemistry Department, Faculty of Science (Boys), Al-Azhar University Nasr City Cairo 11884 Egypt
| | - Ahmed Ragab
- Chemistry Department, Faculty of Science (Boys), Al-Azhar University Nasr City Cairo 11884 Egypt
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36
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Liu Y, Diao H, Hong G, Edward J, Zhang T, Yang G, Yang BM, Zhao Y. Iridium-Catalyzed Enantioconvergent Borrowing Hydrogen Annulation of Racemic 1,4-Diols with Amines. J Am Chem Soc 2023; 145:5007-5016. [PMID: 36802615 DOI: 10.1021/jacs.2c09958] [Citation(s) in RCA: 13] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
We present an enantioconvergent access to chiral N-heterocycles directly from simple racemic diols and primary amines, through a highly economical borrowing hydrogen annulation. The identification of a chiral amine-derived iridacycle catalyst was the key for achieving high efficiency and enantioselectivity in the one-step construction of two C-N bonds. This catalytic method enabled a rapid access to a wide range of diversely substituted enantioenriched pyrrolidines including key precursors to valuable drugs such as aticaprant and MSC 2530818.
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Affiliation(s)
- Yongbing Liu
- Hebei Key Laboratory of Organic Functional Molecules, College of Chemistry and Material Science, Hebei Normal University, Shijiazhuang 050024, China
| | - Huanlin Diao
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Fuzhou 350207, China.,Department of Chemistry, National University of Singapore, Singapore 117544, Republic of Singapore
| | - Guorong Hong
- Department of Chemistry, National University of Singapore, Singapore 117544, Republic of Singapore
| | - Jonathan Edward
- Department of Chemistry, National University of Singapore, Singapore 117544, Republic of Singapore
| | - Tao Zhang
- Department of Chemistry, National University of Singapore, Singapore 117544, Republic of Singapore
| | - Guoqiang Yang
- Department of Chemistry, National University of Singapore, Singapore 117544, Republic of Singapore
| | - Bin-Miao Yang
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Fuzhou 350207, China.,Department of Chemistry, National University of Singapore, Singapore 117544, Republic of Singapore
| | - Yu Zhao
- Joint School of National University of Singapore and Tianjin University, International Campus of Tianjin University, Fuzhou 350207, China.,Department of Chemistry, National University of Singapore, Singapore 117544, Republic of Singapore
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Tamboli Y, Kilbile JT, Deshmukh V, Rane V, Tadiparthi R, Yeole R, Merwade AY. Process Development and Scale-Up of the Novel β-Lactamase Inhibitor WCK 6395. Org Process Res Dev 2023. [DOI: 10.1021/acs.oprd.2c00349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023]
Affiliation(s)
- Yasinalli Tamboli
- Wockhardt Research Centre, D-4, MIDC, Chikalthana, Aurangabad 431006, India
- King Abdullah International Medical Research Center (KAIMRC), Ministry of National Guard-Health Affairs, King Saud Bin Abdulaziz University for Health Sciences, Riyadh 14811, Saudi Arabia
| | - Jaydeo T. Kilbile
- Wockhardt Research Centre, D-4, MIDC, Chikalthana, Aurangabad 431006, India
| | - Vikas Deshmukh
- Wockhardt Research Centre, D-4, MIDC, Chikalthana, Aurangabad 431006, India
| | - Vipul Rane
- Wockhardt Research Centre, D-4, MIDC, Chikalthana, Aurangabad 431006, India
| | | | - Ravindra Yeole
- Wockhardt Research Centre, D-4, MIDC, Chikalthana, Aurangabad 431006, India
| | - Arvind Y. Merwade
- Wockhardt Research Centre, D-4, MIDC, Chikalthana, Aurangabad 431006, India
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Parks HM, Cinelli MA, Bedewitz MA, Grabar JM, Hurney SM, Walker KD, Jones AD, Barry CS. Redirecting tropane alkaloid metabolism reveals pyrrolidine alkaloid diversity in Atropa belladonna. THE NEW PHYTOLOGIST 2023; 237:1810-1825. [PMID: 36451537 PMCID: PMC10107824 DOI: 10.1111/nph.18651] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 11/16/2022] [Indexed: 06/17/2023]
Abstract
Plant-specialized metabolism is complex, with frequent examples of highly branched biosynthetic pathways, and shared chemical intermediates. As such, many plant-specialized metabolic networks are poorly characterized. The N-methyl Δ1 -pyrrolinium cation is a simple pyrrolidine alkaloid and precursor of pharmacologically important tropane alkaloids. Silencing of pyrrolidine ketide synthase (AbPyKS) in the roots of Atropa belladonna (Deadly Nightshade) reduces tropane alkaloid abundance and causes high N-methyl Δ1 -pyrrolinium cation accumulation. The consequences of this metabolic shift on alkaloid metabolism are unknown. In this study, we utilized discovery metabolomics coupled with AbPyKS silencing to reveal major changes in the root alkaloid metabolome of A. belladonna. We discovered and annotated almost 40 pyrrolidine alkaloids that increase when AbPyKS activity is reduced. Suppression of phenyllactate biosynthesis, combined with metabolic engineering in planta, and chemical synthesis indicates several of these pyrrolidines share a core structure formed through the nonenzymatic Mannich-like decarboxylative condensation of the N-methyl Δ1 -pyrrolinium cation with 2-O-malonylphenyllactate. Decoration of this core scaffold through hydroxylation and glycosylation leads to mono- and dipyrrolidine alkaloid diversity. This study reveals the previously unknown complexity of the A. belladonna root metabolome and creates a foundation for future investigation into the biosynthesis, function, and potential utility of these novel alkaloids.
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Affiliation(s)
- Hannah M. Parks
- Department of Biochemistry and Molecular BiologyMichigan State UniversityEast LansingMI48824USA
| | - Maris A. Cinelli
- Department of Biochemistry and Molecular BiologyMichigan State UniversityEast LansingMI48824USA
| | | | - Josh M. Grabar
- Department of HorticultureMichigan State UniversityEast LansingMI48824USA
| | - Steven M. Hurney
- Department of ChemistryMichigan State UniversityEast LansingMI48824USA
| | - Kevin D. Walker
- Department of Biochemistry and Molecular BiologyMichigan State UniversityEast LansingMI48824USA
- Department of ChemistryMichigan State UniversityEast LansingMI48824USA
| | - A. Daniel Jones
- Department of Biochemistry and Molecular BiologyMichigan State UniversityEast LansingMI48824USA
| | - Cornelius S. Barry
- Department of HorticultureMichigan State UniversityEast LansingMI48824USA
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Recent Advances in Asymmetric Synthesis of Pyrrolidine-Based Organocatalysts and Their Application: A 15-Year Update. Molecules 2023; 28:molecules28052234. [PMID: 36903480 PMCID: PMC10005811 DOI: 10.3390/molecules28052234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 02/21/2023] [Accepted: 02/24/2023] [Indexed: 03/05/2023] Open
Abstract
In 1971, chemists from Hoffmann-La Roche and Schering AG independently discovered a new asymmetric intramolecular aldol reaction catalyzed by the natural amino acid proline, a transformation now known as the Hajos-Parrish-Eder-Sauer-Wiechert reaction. These remarkable results remained forgotten until List and Barbas reported in 2000 that L-proline was also able to catalyze intermolecular aldol reactions with non-negligible enantioselectivities. In the same year, MacMillan reported on asymmetric Diels-Alder cycloadditions which were efficiently catalyzed by imidazolidinones deriving from natural amino acids. These two seminal reports marked the birth of modern asymmetric organocatalysis. A further important breakthrough in this field happened in 2005, when Jørgensen and Hayashi independently proposed the use of diarylprolinol silyl ethers for the asymmetric functionalization of aldehydes. During the last 20 years, asymmetric organocatalysis has emerged as a very powerful tool for the facile construction of complex molecular architectures. Along the way, a deeper knowledge of organocatalytic reaction mechanisms has been acquired, allowing for the fine-tuning of the structures of privileged catalysts or proposing completely new molecular entities that are able to efficiently catalyze these transformations. This review highlights the most recent advances in the asymmetric synthesis of organocatalysts deriving from or related to proline, starting from 2008.
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Wu K, Zhang X, Wu LL, Huang JS, Che CM. A Convergent, Modular Approach to Trifluoromethyl-Bearing 5-Membered Rings via Catalytic C(sp 3 )-H Activation. Angew Chem Int Ed Engl 2023; 62:e202215891. [PMID: 36596721 DOI: 10.1002/anie.202215891] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 01/02/2023] [Accepted: 01/03/2023] [Indexed: 01/05/2023]
Abstract
Trifluoromethyl-bearing 5-membered rings are prevalent in bioactive molecules, but modular approaches to these compounds by functionalization of robust C(sp3 )-H bonds in a direct and selective manner are extremely challenging. Herein we report the rhodium-catalyzed α-CF3 -α-alkyl carbene insertion into C(sp3 )-H bonds of a broad range of substrates to access 7 types of CF3 -bearing saturated 5-membered carbo- and heterocycles. The reaction is particularly effective for benzylic C-H insertion exerting good site-, diastereo- and enantiocontrol, and applicable to the synthesis of chiral CF3 analogues of bioactive molecules. Ruthenium α-CF3 -α-alkyl carbene complexes underwent stoichiometric reactions to give C-H insertion products, lending evidence for the involvement of metal α-CF3 -α-alkyl carbene species in the catalytic cycle. DFT calculations revealed that the π⋅⋅⋅π attraction and intra-carbene C-H⋅⋅⋅F hydrogen bond elucidate the origin of selectivity of the benzylic C-H insertion reactions.
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Affiliation(s)
- Kai Wu
- State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Xuyang Zhang
- State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China.,Chemistry and Chemical Engineering of Guangdong Provincial Laboratory, No. 1, College Road, Tuojiang Street, Jinping District, Shantou, Guangdong, 515041, China
| | - Liang-Liang Wu
- State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Jie-Sheng Huang
- State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China
| | - Chi-Ming Che
- State Key Laboratory of Synthetic Chemistry, Department of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong, China.,Chemistry and Chemical Engineering of Guangdong Provincial Laboratory, No. 1, College Road, Tuojiang Street, Jinping District, Shantou, Guangdong, 515041, China.,Laboratory for Synthetic Chemistry and Chemical Biology Limited, Units 1503-1511, 15/F., Building 17W, Hong Kong Science and Technology Parks, New Territories, Hong Kong, China
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Kumar Tarai S, Mandal S, Bhaduri R, Pan A, Biswas P, Bhattacharjee A, Moi SC. Bioactivity, molecular docking and anticancer behavior of pyrrolidine based Pt(II) complexes: Their kinetics, DNA and BSA binding study by spectroscopic methods. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 287:122059. [PMID: 36410178 DOI: 10.1016/j.saa.2022.122059] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/29/2022] [Accepted: 10/26/2022] [Indexed: 06/16/2023]
Abstract
The complex [Pt(AEP)Cl2]; C-1 (where, AEP = 1-(2-Aminoethyl) pyrrolidine) and its hydrolyzed diaqua form cis-[Pt(AEP)(H2O)2]2+; C-2 were synthesized for their bioactivity and in vitro kinetic study with bioactive thiol group (-SH) containing ligands (like; L- cysteine and N-ac-L- cysteine) for their biological importance for 'drug reservoir' activity. The Thermal Gravimetric Analysis (TGA) was executed to confirm about the weight loss due to coordinated water molecules at high temperature range. At pH 4.0, the substitution behavior of C-2 with the thiols was studied in pseudo-first order reaction condition. The interaction mechanism of thiols with complex C-2 to their corresponding thiol substituted C-3 [Pt(AEP)(L-cys)] and C-4 [Pt(AEP)(N-ac-L-cys)] (where L-cys = L-cysteine and N-ac-L-cys = N-ac-L- cysteine) were proposed from their thermodynamical activation parameters (ΔH≠ and ΔS≠), which were obtained from Eyring equation. DNA and BSA binding activity of the complexes C-1 to C-4 were investigated by gel electrophoresis technique, spectroscopic titration and viscosity methods. The binding activity of the complexes with DNA and BSA was evaluated using a theoretical approach molecular docking study. The drug-like nature of the complexes is supported by the prediction of activity spectra for substance (PASS) from 2D structure of the Pt(II) complexes. Structural optimization, HOMO-LUMO energy calculation, Molecular electrostatic potential surface, NBO and TD-DFT calculation were executed by using density functional theory (DFT) with Gaussian 09 software package to pre-assessment of biological activity of the complexes. DFT-based descriptors were determined from the HOMO-LUMA energy to be related with the ability of binding affinity of Pt(II) complexes towards DNA and BSA to the formation of their corresponding adducts. The anticancer property of the design complexes were examined on HCT116 (colorectal carcinoma) cancer cell lines and as well as human normal cell NKE (Normal Kidney Epithelial) and compared with the recognised anticancer drug cisplatin. The Reactive Oxygen Species (ROS) production was assessed by DCFDA assay in presence of the Pt(II) complexes.
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Affiliation(s)
- Swarup Kumar Tarai
- Department of Chemistry, National Institute of Technology Durgapur, Durgapur 713209, West Bengal, India
| | - Saikat Mandal
- Department of Chemistry, National Institute of Technology Durgapur, Durgapur 713209, West Bengal, India
| | - Rituparna Bhaduri
- Department of Chemistry, National Institute of Technology Durgapur, Durgapur 713209, West Bengal, India
| | - Angana Pan
- Department of Chemistry, National Institute of Technology Durgapur, Durgapur 713209, West Bengal, India
| | - Pritam Biswas
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur 713209, West Bengal, India
| | - Ashish Bhattacharjee
- Department of Biotechnology, National Institute of Technology Durgapur, Durgapur 713209, West Bengal, India
| | - Sankar Ch Moi
- Department of Chemistry, National Institute of Technology Durgapur, Durgapur 713209, West Bengal, India.
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Novel pyrrolidine-aminophenyl-1,4-naphthoquinones: structure-related mechanisms of leukemia cell death. Mol Cell Biochem 2023; 478:393-406. [PMID: 35836027 DOI: 10.1007/s11010-022-04514-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 06/24/2022] [Indexed: 02/02/2023]
Abstract
Novel derivatives of aminophenyl-1,4-naphthoquinones, in which a pyrrolidine group was added to the naphthoquinone ring, were synthesized and investigated for the mechanisms of leukemic cell killing. The novel compounds, TW-85 and TW-96, differ in the functional (methyl or hydroxyl) group at the para-position of the aminophenyl moiety. TW-85 and TW-96 were found to induce concentration- and time-dependent apoptotic and/or necrotic cell death in human U937 promonocytic leukemia cells but only TW-96 could also kill K562 chronic myeloid leukemia cells and CCRF-CEM lymphoblastic leukemia cells. Normal peripheral blood mononuclear cells were noticeably less responsive to both compounds than leukemia cells. At low micromolar concentrations used, TW-85 killed U937 cells mainly by inducing apoptosis. TW-96 was a weaker apoptotic agent in U937 cells but proved to be cytotoxic and a stronger inducer of necrosis in all three leukemic cell lines tested. Both compounds induced mitochondrial permeability transition pore opening, cytochrome c release, and caspase activation in U937 cells. Cytotoxicity induced by TW-96, but not by TW-85, was associated with the elevation of the cytosolic levels of reactive oxygen species (ROS). The latter was attenuated by diphenyleneiodonium, indicating that NADPH oxidase was likely to be the source of ROS generation. Activation of p38 MAPK by the two agents appeared to prevent necrosis but differentially affected apoptotic cell death in U937 cells. These results further expand our understanding of the structure-activity relationship of aminophenyl-1,4-naphthoquinones as potential anti-leukemic agents with distinct modes of action.
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43
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Poyraz S, Döndaş HA, Sansano JM, Belveren S, Yamali C, Ülger M, Döndaş NY, Sağlık BN, Pask CM. N-Benzoylthiourea-pyrrolidine carboxylic acid derivatives bearing an imidazole moiety: Synthesis, characterization, crystal structure, in vitro ChEs inhibition, and antituberculosis, antibacterial, antifungal studies. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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44
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Kamlar M, Urban M, Veselý J. Enantioselective Synthesis of Spiro Heterocyclic Compounds Using a Combination of Organocatalysis and Transition-Metal Catalysis. CHEM REC 2023:e202200284. [PMID: 36703545 DOI: 10.1002/tcr.202200284] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 12/30/2022] [Indexed: 01/28/2023]
Abstract
Over the last ten years, the combination of organocatalysis with transition metal (TM) catalysis has become one of the most important toolboxes used for synthesizing optically pure compounds containing chiral quaternary centers, including spiro heterocyclic molecules. The dominant method in the enantioselective synthesis of spiro heterocyclic compounds based on synergistic catalysis includes chiral aminocatalysis and NHC catalysis, as already established covalent organocatalytic strategies. Another area of organocatalysis widely combined with TM catalysis producing enantiomerically enriched spiro heterocyclic compounds is non-covalent catalysis, dominated by chiral phosphoric acids, thiourea, and squaramide derivatives. This review article aims to summarize enantioselective methods used for constructing spirocyclic heterocycles based on a combination of organocatalysis and transition metal catalysis.
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Affiliation(s)
- Martin Kamlar
- Charles University Faculty of Science: Univerzita Karlova Prirodovedecka fakulta, Prague, CZECH REPUBLIC
| | - Michal Urban
- Charles University Faculty of Science: Univerzita Karlova Prirodovedecka fakulta, Prague, CZECH REPUBLIC
| | - Jan Veselý
- Charles University Faculty of Science: Univerzita Karlova Prirodovedecka fakulta, Prague, CZECH REPUBLIC
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Singh M, Dhote P, Johnson DR, Figueroa-Lazú S, Elles CG, Boskovic Z. Photochemical Decarbonylation of Oxetanone and Azetidinone: Spectroscopy, Computational Models, and Synthetic Applications. Angew Chem Int Ed Engl 2023; 62:e202215856. [PMID: 36399366 PMCID: PMC9839639 DOI: 10.1002/anie.202215856] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 11/17/2022] [Accepted: 11/18/2022] [Indexed: 11/19/2022]
Abstract
Photoexcitation of cyclic ketones leads to the expulsion of carbon monoxide and a mixture of products derived from diradical intermediates. Here we show that synthetic utility of this process is improved if strained heterocyclic ketones are used. Photochemistry of 3-oxetanone and N-Boc-3-azetidinone has not been previously described. Decarbonylation of these 4-membered rings proceeds through a step-wise Norrish type I cleavage of the C-C bond from the singlet excited state. Ylides derived from both compounds are high-energy species that are kinetically stable long enough to undergo [3+2] cycloaddition with a variety of alkenes and produce substituted tetrahydrofurans and pyrrolidines. The reaction has a sufficiently wide scope to produce scaffolds that were either previously inaccessible or difficult to synthesize, thereby providing experimental access to new chemical space.
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Affiliation(s)
- Manvendra Singh
- Department of Medicinal Chemistry, University of Kansas, Lawrence, 66045 Kansas
| | - Pawan Dhote
- Department of Medicinal Chemistry, University of Kansas, Lawrence, 66045 Kansas
| | - Daniel R. Johnson
- Department of Chemistry, University of Kansas, Lawrence, 66045 Kansas
| | | | | | - Zarko Boskovic
- Department of Medicinal Chemistry, University of Kansas, Lawrence, 66045 Kansas
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46
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Bhat AA, Singh I, Tandon N, Tandon R. Structure activity relationship (SAR) and anticancer activity of pyrrolidine derivatives: Recent developments and future prospects (A review). Eur J Med Chem 2023; 246:114954. [PMID: 36481599 DOI: 10.1016/j.ejmech.2022.114954] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 11/08/2022] [Accepted: 11/20/2022] [Indexed: 11/29/2022]
Abstract
Pyrrolidine molecules are a significant class of synthetic and natural plant metabolites, which show the diversity of pharmacological activities. An extensive variety of synthetic pyrrolidine compounds with numerous derivatization like spirooxindole, thiazole, metal complexes, coumarin, etc have revealed significant anticancer activity. Pyrrolidine molecules are found not only as potential anticancer candidates but also retain the lowest side effects. Depending upon the diverse substitution patterns of the derivatives, these molecules have demonstrated an incredible ability to regulate the various targets to give excellent anti-proliferative activities. Taking these into consideration, efforts have been taken by the scientific fraternity to design and develop a potent anticancer scaffold with negligible side effects. In the present review, we cover the latest advancements in the synthesis of pyrrolidine molecules which have promising anticancer activity toward numerous cancer cell lines. Additionally, it also highlights the effectiveness of derivatives via elucidation of Structural-Activity-Relationship (SAR) which is discussed in detail.
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Affiliation(s)
- Aeyaz Ahmad Bhat
- Department of Chemistry, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, 144411, India.
| | - Iqubal Singh
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, 144411, India
| | - Nitin Tandon
- Department of Chemistry, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, 144411, India.
| | - Runjhun Tandon
- Department of Chemistry, School of Chemical Engineering and Physical Sciences, Lovely Professional University, Phagwara, 144411, India.
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47
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Jiang Y, Tian J, Guo H, Gong Y, Yu S, Yu X, Pu L. Chemoselective and Enantioselective Fluorescent Recognition of Prolinol. J Org Chem 2023; 88:211-217. [PMID: 36525553 DOI: 10.1021/acs.joc.2c02152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A highly chemoselective and enantioselective fluorescent probe has been discovered for the recognition of prolinol among various primary and secondary amine-based amino alcohols. The mechanistic studies including 1D and 2D 1H/13C NMR and mass spectroscopic analyses and DFT calculations have shown that the aldehyde group of the probe can react with prolinol to generate a bicyclic oxazolidine unit which, through a possible intramolecular hydrogen bond interaction, will lead to highly selective fluorescence enhancement.
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Affiliation(s)
- Yixuan Jiang
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Jun Tian
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Hongyu Guo
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Yan Gong
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Shanshan Yu
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Xiaoqi Yu
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, China
| | - Lin Pu
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, United States
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Gallarati S, van Gerwen P, Laplaza R, Vela S, Fabrizio A, Corminboeuf C. OSCAR: an extensive repository of chemically and functionally diverse organocatalysts. Chem Sci 2022; 13:13782-13794. [PMID: 36544722 PMCID: PMC9710326 DOI: 10.1039/d2sc04251g] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2022] [Accepted: 10/24/2022] [Indexed: 12/24/2022] Open
Abstract
The automated construction of datasets has become increasingly relevant in computational chemistry. While transition-metal catalysis has greatly benefitted from bottom-up or top-down strategies for the curation of organometallic complexes libraries, the field of organocatalysis is mostly dominated by case-by-case studies, with a lack of transferable data-driven tools that facilitate both the exploration of a wider range of catalyst space and the optimization of reaction properties. For these reasons, we introduce OSCAR, a repository of 4000 experimentally derived organocatalysts along with their corresponding building blocks and combinatorially enriched structures. We outline the fragment-based approach used for database generation and showcase the chemical diversity, in terms of functions and molecular properties, covered in OSCAR. The structures and corresponding stereoelectronic properties are publicly available (https://archive.materialscloud.org/record/2022.106) and constitute the starting point to build generative and predictive models for organocatalyst performance.
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Affiliation(s)
- Simone Gallarati
- Laboratory for Computational Molecular Design, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL)1015 LausanneSwitzerland
| | - Puck van Gerwen
- Laboratory for Computational Molecular Design, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL)1015 LausanneSwitzerland,National Center for Competence in Research – Catalysis (NCCR-Catalysis), Ecole Polytechnique Fédérale de Lausanne (EPFL)1015 LausanneSwitzerland
| | - Ruben Laplaza
- Laboratory for Computational Molecular Design, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL)1015 LausanneSwitzerland,National Center for Competence in Research – Catalysis (NCCR-Catalysis), Ecole Polytechnique Fédérale de Lausanne (EPFL)1015 LausanneSwitzerland
| | - Sergi Vela
- Laboratory for Computational Molecular Design, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL)1015 LausanneSwitzerland
| | - Alberto Fabrizio
- Laboratory for Computational Molecular Design, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL)1015 LausanneSwitzerland,National Center for Computational Design and Discovery of Novel Materials (MARVEL), Ecole Polytechnique Fédérale de Lausanne (EPFL)1015 LausanneSwitzerland
| | - Clemence Corminboeuf
- Laboratory for Computational Molecular Design, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne (EPFL)1015 LausanneSwitzerland,National Center for Competence in Research – Catalysis (NCCR-Catalysis), Ecole Polytechnique Fédérale de Lausanne (EPFL)1015 LausanneSwitzerland,National Center for Computational Design and Discovery of Novel Materials (MARVEL), Ecole Polytechnique Fédérale de Lausanne (EPFL)1015 LausanneSwitzerland
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49
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Liu Q, Yoshikawa I, Kudo K. Synthesis of 2-trifluoromethylated 3-pyrrolines/pyrrolidines via [3+2] cycloaddition of azomethine ylides with the participation of 3,3,3-trifluoroalanine. J Fluor Chem 2022. [DOI: 10.1016/j.jfluchem.2022.110061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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50
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Discovery of Highly Functionalized 5-hydroxy-2H-pyrrol-2-ones That Exhibit Antiestrogenic Effects in Breast and Endometrial Cancer Cells and Potentiate the Antitumoral Effect of Tamoxifen. Cancers (Basel) 2022; 14:cancers14215174. [DOI: 10.3390/cancers14215174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 10/14/2022] [Accepted: 10/17/2022] [Indexed: 11/17/2022] Open
Abstract
Tamoxifen improves the overall survival rate in hormone receptor-positive breast cancer patients. However, despite the fact that it exerts antagonistic effects on the ERα, it can act as a partial agonist, resulting in tumor growth in estrogen-sensitive tissues. In this study, highly functionalized 5-hydroxy-2H-pyrrol-2-ones were synthesized and evaluated by using ERα- and phenotype-based screening assays. Compounds 32 and 35 inhibited 17β-estradiol (E2)-stimulated ERα-mediated transcription of the luciferase reporter gene in breast cancer cells without inhibition of the transcriptional activity mediated by androgen or glucocorticoid receptors. Compound 32 regulated E2-stimulated ERα-mediated transcription by partial antagonism, whereas compound 35 caused rapid and non-competitive inhibition. Monitoring of 2D and 3D cell growth confirmed potent antitumoral effects of both compounds on ER-positive breast cancer cells. Furthermore, compounds 32 and 35 caused apoptosis and blocked the cell cycle of ER-positive breast cancer cells in the sub-G1 and G0/G1 phases. Interestingly, compound 35 suppressed the functional activity of ERα in the uterus, as demonstrated by the inhibition of E2-stimulated transcription of estrogen and progesterone receptors and alkaline phosphatase enzymatic activity. Compound 35 showed a relatively low binding affinity with ERα. However, its antiestrogenic effect was associated with an increased polyubiquitination and a reduced protein expression of ERα. Clinically relevant, a possible combinatory therapy with compound 35 may enhance the antitumoral efficacy of 4-hydroxy-tamoxifen in ER-positive breast cancer cells. In silico ADME predictions indicated that these compounds exhibit good drug-likeness, which, together with their potential antitumoral effects and their lack of estrogenic activity, offers a pharmacological opportunity to deepen the study of ER-positive breast cancer treatment.
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