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Raje S, Koner A, Ghosh S, Butcher RJ, Mathivathanan L, Sundararajan M, Angamuthu R. Late-stage Ligand Modification After Coordination Strengthens Stereoselectively Self-Assembled Hemiaminal Ether Complexes. Chem Asian J 2023; 18:e202300706. [PMID: 37655885 DOI: 10.1002/asia.202300706] [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: 08/12/2023] [Revised: 08/29/2023] [Accepted: 09/01/2023] [Indexed: 09/02/2023]
Abstract
Fragile hemiaminal ether linkages present in the backbone of koneramines (LR OR'), tridentate ligands, bound to copper(II) in stereoselectively self-assembled syn-[Cu(LR OR')X2 ] complexes were transformed into sturdy methylene linkages to make corresponding rac-[Cu(LR H)Cl2 ] complexes by late-stage ligand modification after coordination with the retention of coordination sphere. The generality of stereoselective self-assembly of koneramine complexes is shown by utilising a number of metal ions, anions, amines, alcohols and thiols with complete characterisations.
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Affiliation(s)
- Sakthi Raje
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Abhishek Koner
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Suchismita Ghosh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Ray J Butcher
- Department of Chemistry, Howard University, Washington, D.C., 20059, USA
| | - Logesh Mathivathanan
- Department of Chemistry, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu, 632014, India
| | - Mahesh Sundararajan
- Theoretical Chemistry Section, Chemistry Division, Bhabha Atomic Research Centre, Mumbai-400085 (India), Homi Bhabha National Institute, Mumbai, 400085, India
| | - Raja Angamuthu
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
- Department of Sustainable Energy Engineering, Indian Institute of Technology Kanpur, Kanpur, 208016, India
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2
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Potent Antibiotic Lemonomycin: A Glimpse of Its Discovery, Origin, and Chemical Synthesis. Molecules 2022; 27:molecules27134324. [PMID: 35807568 PMCID: PMC9268379 DOI: 10.3390/molecules27134324] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 07/01/2022] [Accepted: 07/01/2022] [Indexed: 02/05/2023] Open
Abstract
Lemonomycin (1) was first isolated from the fermentation broth of Streptomyces candidus in 1964. The complete chemical structure was not elucidated until 2000 with extensive spectroscopic analysis. Lemonomycin is currently known as the only glycosylated tetrahydroisoquinoline antibiotic. Its potent antibacterial activity against Staphylococcus aureus and Bacillus subtilis and complex architecture make it an ideal target for total synthesis. In this short review, we summarize the research status of lemonomycin for biological activity, biosynthesis, and chemical synthesis. The unique deoxy aminosugar-lemonose was proposed to play a crucial role in biological activity, as shown in other antibiotics, such as arimetamycin A, nocathiacin I, glycothiohexide α, and thiazamycins. Given the self-resistance of the original bacterial host, the integration of biosynthesis and chemical synthesis to pursue efficient synthesis and further derivatization is in high demand for the development of novel antibiotics to combat antibiotic-resistant infections.
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3
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Zhou JY, Tian R, Zhu YM. Nickel-Catalyzed Selective Decarbonylation of α-Amino Acid Thioester: Aminomethylation of Mercaptans. J Org Chem 2021; 86:12148-12157. [PMID: 34397221 DOI: 10.1021/acs.joc.1c01480] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The nickel-catalyzed aminomethylation of mercaptans has been disclosed that offers efficient and expedient access to synthesize α-aminosulfides. The intramolecular fragment coupling shows excellent chemoselectivity. This transformation shows good functional-group compatibility, tolerates a wide range of electron-withdrawing, electron-neutral, and electron-donating substituents in this process, and can serve as a powerful synthetic tool for the synthesis of α-aminosulfides at a gram scale. Thus, the newly developed methodology enables a facile route for C-S bond formation in a straightforward fashion.
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Affiliation(s)
- Jing-Ya Zhou
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Rui Tian
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
| | - Yong-Ming Zhu
- College of Pharmaceutical Sciences, Soochow University, Suzhou 215123, China
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4
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Bilitewski U, Laschat S, Schädel N, Icik E, Martini M, Altevogt L, Ramming I, Greulich A, Baro A. Synthesis of Imidazole and Histidine-Derived Cross-Linkers as Analogues of GOLD and Desmosine. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/s-0040-1706144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
AbstractAmino acid derivatives with a central cationic heterocyclic core (e.g., imidazolium) are biologically relevant cross-linkers of proteins and advanced glycation end (AGE) products. Here, imidazolium-containing cross-linkers were synthesized from imidazole or histidine by N-alkylation employing aspartate- and glutamate-derived mesylates as key step. Biological investigations were carried out to probe the biocompatibility of these compounds.
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Affiliation(s)
- Ursula Bilitewski
- AG Compound Profiling and Screening, Helmholtz Zentrum für Infektionsforschung
| | | | | | - Esra Icik
- Institut für Organische Chemie, Universität Stuttgart
| | - Maike Martini
- Institut für Organische Chemie, Universität Stuttgart
| | - Luca Altevogt
- Institut für Organische Chemie, Universität Stuttgart
- AG Compound Profiling and Screening, Helmholtz Zentrum für Infektionsforschung
| | - Isabell Ramming
- AG Compound Profiling and Screening, Helmholtz Zentrum für Infektionsforschung
| | | | - Angelika Baro
- Institut für Organische Chemie, Universität Stuttgart
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5
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Tracy JS, Kalnmals CA, Toste FD. Beyond Allylic Alkylation: Applications of Trost Chemistry in Complex Molecule Synthesis. Isr J Chem 2021. [DOI: 10.1002/ijch.202000103] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jacob S. Tracy
- Dept. of Chemistry University of California, Berkeley MC 1460 Berkeley CA 94720 USA
| | | | - F. Dean Toste
- Dept. of Chemistry University of California, Berkeley MC 1460 Berkeley CA 94720 USA
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6
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Zheng Y, Li XD, Sheng PZ, Yang HD, Wei K, Yang YR. Asymmetric Total Syntheses of (−)-Fennebricin A, (−)-Renieramycin J, (−)-Renieramycin G, (−)-Renieramycin M, and (−)- Jorunnamycin A via C–H Activation. Org Lett 2020; 22:4489-4493. [PMID: 32437173 DOI: 10.1021/acs.orglett.0c01493] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yu Zheng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xue-Dan Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Peng-Zhen Sheng
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Hong-Dou Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Kun Wei
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
| | - Yu-Rong Yang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
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Du E, Pan X, Guan B, Liu Z. Asymmetric synthesis of highly functionalized tyrosine derivatives for the construction of bistetrahydroisoquinoline alkaloids. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2018.07.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Meng K, Shim P, Wang Q, Zhao S, Gu T, Kahsai AW, Ahn S, Chen X. Design, synthesis, and functional assessment of Cmpd-15 derivatives as negative allosteric modulators for the β2-adrenergic receptor. Bioorg Med Chem 2018; 26:2320-2330. [DOI: 10.1016/j.bmc.2018.03.023] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Revised: 03/12/2018] [Accepted: 03/14/2018] [Indexed: 11/25/2022]
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9
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Huang DM, Li HJ, Wang JH, Wu YC. Asymmetric total synthesis of talienbisflavan A. Org Biomol Chem 2018; 16:585-592. [PMID: 29293253 DOI: 10.1039/c7ob02837g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
The first asymmetric total syntheses of talienbisflavan A and bis-8,8'-epicatechinylmethane as well as a facile synthesis of bis-8,8'-catechinylmethane has been accomplished from readily available starting materials by using a newly developed direct regioselective methylenation of catechin derivatives as one of the key steps.
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Affiliation(s)
- Deng-Ming Huang
- School of Marine Science and Technology, Harbin Institute of Technology, Weihai 264209, P. R. China.
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10
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Raje S, Mani K, MinnathParsutkar M, Angamuthu R. Metal ions as external stimuli in stereoselective self-sorting of koneramines and thiokoneramines. NEW J CHEM 2017. [DOI: 10.1039/c7nj01941f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Stereoselective self-sorting of koneramines and thiokoneramines, which are N3 ligands, evolved from the system of pyridine-2-carboxaldehyde, mono-N-substituted ethylenediamine, primary alcohol or thiol, is observed when metal ions such as Ni(ii), Cu(ii), Zn(ii) and Cd(ii) are added as external stimuli to isolate the emergent molecule.
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Affiliation(s)
- Sakthi Raje
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC)
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Kalaikodikumaran Mani
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC)
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Mahesh MinnathParsutkar
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC)
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
| | - Raja Angamuthu
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC)
- Department of Chemistry
- Indian Institute of Technology Kanpur
- Kanpur 208016
- India
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11
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The formation of carbon–carbon and carbon–heteroatom bonds using silver tetrafluoroborate as a promoter. ARAB J CHEM 2016. [DOI: 10.1016/j.arabjc.2015.06.038] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
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12
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Chrzanowska M, Grajewska A, Rozwadowska MD. Asymmetric Synthesis of Isoquinoline Alkaloids: 2004-2015. Chem Rev 2016; 116:12369-12465. [PMID: 27680197 DOI: 10.1021/acs.chemrev.6b00315] [Citation(s) in RCA: 235] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
In the past decade, the asymmetric synthesis of chiral nonracemic isoquinoline alkaloids, a family of natural products showing a wide range of structural diversity and biological and pharmaceutical activity, has been based either on continuation or improvement of known traditional methods or on new, recently developed, strategies. Both diastereoselective and enantioselective catalytic methods have been applied. This review describes the stereochemically modified traditional syntheses (the Pictet-Spengler, the Bischler-Napieralski, and the Pomeranz-Fritsch-Bobbitt) along with strategies based on closing of the nitrogen-containing ring B of the isoquinoline core by the formation of bonds between C1-N2, N2-C3, C1-N2/N2-C3, and C1-N2/C4-C4a atoms. Methods involving introduction of substituents at the C1 carbon of isoquinoline core along with syntheses applying various biocatalytic techniques have also been reviewed.
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Affiliation(s)
- Maria Chrzanowska
- Faculty of Chemistry, Adam Mickiewicz University , Umultowska 89b, 61-614 Poznań, Poland
| | - Agnieszka Grajewska
- Faculty of Chemistry, Adam Mickiewicz University , Umultowska 89b, 61-614 Poznań, Poland
| | - Maria D Rozwadowska
- Faculty of Chemistry, Adam Mickiewicz University , Umultowska 89b, 61-614 Poznań, Poland
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13
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Tanifuji R, Oguri H, Koketsu K, Yoshinaga Y, Minami A, Oikawa H. Catalytic asymmetric synthesis of the common amino acid component in the biosynthesis of tetrahydroisoquinoline alkaloids. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2015.12.110] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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14
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Raje S, Gurusamy S, Koner A, Mehrotra S, Jennifer SJ, Vasudev PG, Butcher RJ, Angamuthu R. Multicomponent One-pot Reactions Towards the Synthesis of Stereoisomers of Dipicolylamine Complexes. Chem Asian J 2015; 11:128-35. [PMID: 26415522 DOI: 10.1002/asia.201500889] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Indexed: 11/11/2022]
Abstract
Reported are multi-component one-pot syntheses of chiral complexes [M(L(R) OR')Cl2 ] or [M(L(R) SR')Cl2 ] from the mixture of an N-substituted ethylenediamine, pyridine-2-carboxaldehyde, a primary alcohol or thiol and MCl2 utilizing in-situ formed cyclized Schiff bases where a C-O bond, two stereocenters, and three C-N bonds are formed (M=Zn, Cu, Ni, Cd; R=Et, Ph; R'=Me, Et, nPr, nBu). Tridentate ligands L(R) OR' and L(R) SR' comprise two chiral centers and a hemiaminal ether or hemiaminal thioether moiety on the dipicolylamine skeleton. Syn-[Zn(L(Ph) OMe)Cl2 ] precipitates out readily from the reaction mixture as a major product whereas anti-[Zn(L(Ph) OMe)Cl2 ] stays in solution as minor product. Both syn-[Zn(L(Ph) OMe)Cl2 ] and anti-[Zn(L(Ph) OMe)Cl2 ] were characterized using NMR spectroscopy and mass spectrometry. Solid-state structures revealed that syn-[Zn(L(Ph) OMe)Cl2 ] adopted a square pyramidal geometry while anti-[Zn(L(Ph) OMe)Cl2 ] possesses a trigonal bipyramidal geometry around the Zn centers. The scope of this method was shown to be wide by varying the components of the dynamic coordination assembly, and the structures of the complexes isolated were confirmed by NMR spectroscopy, mass spectrometry, and X-ray crystallography. Syn complexes were isolated as major products with Zn(II) and Cu(II) , and anti complexes were found to be major products with Ni(II) and Cd(II) . Hemiaminals and hemiaminal ethers are known to be unstable and are seldom observed as part of cyclic organic compounds or as coordinated ligands assembled around metals. It is now shown, with the support of experimental results, that linear hemiaminal ethers or thioethers can be assembled without the assistance of Lewis acidic metals in the multi-component assembly, and a possible pathway of the formation of hemiaminal ethers has been proposed.
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Affiliation(s)
- Sakthi Raje
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC), Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Sureshbabu Gurusamy
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC), Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Abhishek Koner
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC), Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Sonam Mehrotra
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC), Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Samson Jegan Jennifer
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC), Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India
| | - Prema G Vasudev
- Metabolic and Structural Biology Division, CSIR-Central Institute of Medicinal and Aromatic Plants (CIMAP), Lucknow, 226015, India
| | - Ray J Butcher
- Department of Chemistry, Howard University, Washington, D.C., 20059, USA
| | - Raja Angamuthu
- Laboratory of Inorganic Synthesis and Bioinspired Catalysis (LISBIC), Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur, 208016, India.
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15
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Ishitani H, Suzuki H, Saito Y, Yamashita Y, Kobayashi S. Hafnium Trifluoromethanesulfonate [Hf(OTf)4] as a Unique Lewis Acid in Organic Synthesis. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500423] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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16
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Li HJ, Wang CC, Zhu S, Dai CY, Wu YC. Ruthenium(II)-Catalyzed Hydrogen Transfer/Annulation Cascade Processes between Alcohols and 2-Nitrobenzaldehydes. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201400898] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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17
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Chen PT, Lin CK, Tsai CJ, Huang DY, Nien FY, Lin WW, Cheng WC. Expeditious synthesis of enantiopure, orthogonally protected bis-α-amino acids (OPBAAs) and their use in a study of Nod1 stimulation. Chem Asian J 2014; 10:474-82. [PMID: 25504924 DOI: 10.1002/asia.201403173] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Indexed: 11/09/2022]
Abstract
A convenient approach towards the synthesis of orthogonally protected chiral bis-α-amino acids (OPBAAs) is described. The key transformations include: (1) a highly stereoselective conjugation (alkylation) of the Schöllkopf bis-lactim ethers and oxazolidinyl alkyl halides to build a backbone skeleton; and (2) our orthogonal protection strategy. A series of enantiopure OPBAAs bearing a variety of alkyl chain as a spacer; two stereogenic centers; and three protecting groups were prepared as examples. These versatile molecules were applied to the synthesis of biologically interesting di- or tri-peptide analogues, including chiral iE-meso-DAP and A-iE-meso-DAP, for the study of Nod1 activation in the innate immune response.
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Affiliation(s)
- Po-Ting Chen
- The Genomics Research Center, Academia Sinica, No. 128, Academia Road Sec. 2, Nankang District, Taipei, 11529 (Taiwan), Fax: (+886) 2-27899931
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18
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Bi(OTf)3-catalyzed tandem reaction of naphthols with β,γ-unsaturated α-ketoesters. Efficient synthesis of functionalized 4H-chromenes. CHINESE CHEM LETT 2014. [DOI: 10.1016/j.cclet.2014.05.023] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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19
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Regioselective electrophilic aromatic bromination: theoretical analysis and experimental verification. Molecules 2014; 19:3401-16. [PMID: 24658566 PMCID: PMC6271510 DOI: 10.3390/molecules19033401] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 03/10/2014] [Accepted: 03/13/2014] [Indexed: 11/24/2022] Open
Abstract
Electrophilic aromatic bromination is the most common synthetic method used to prepare aryl bromides, which are very useful intermediates in organic synthesis. To understand the experimental results in electrophilic aromatic brominations, ab initio calculations are used here for a tentative analysis of the positional selectivity. The calculated results agree well with the corresponding experimental data, and the reliability of the resulting positional selectivity was verified by the corresponding experimental data.
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George N, Bekkaye M, Alix A, Zhu J, Masson G. NIS-Assisted Aza-Friedel-Crafts Reaction with α-Carbamoysulfides as Precursors ofN-Carbamoylimines. Chemistry 2014; 20:3621-5. [DOI: 10.1002/chem.201400117] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2014] [Indexed: 11/06/2022]
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21
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Asymmetric Phase-Transfer Catalysis as a Powerful Tool in the Synthesis of Biologically Active Chiral Complex Natural Products. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/b978-0-444-63430-6.00014-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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22
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Jiménez-Somarribas A, Williams RM. Synthetic studies on lemonomycin: construction of the tetracyclic core. Tetrahedron 2013; 69:7505-7512. [PMID: 25083002 DOI: 10.1016/j.tet.2013.05.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
A substrate-induced stereocontrol strategy was used to gain access to the tetracyclic core of (-)-lemonomycin. An advanced intermediate was prepared from a known substituted tyrosinol through a 16-step sequence, which involved a Pictet-Spengler reaction, a [3+2] dipolar cycloaddition and an enamide hydrogenation.
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Affiliation(s)
| | - Robert M Williams
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States ; University of Colorado Cancer Center, Aurora, Colorado 80045, United States
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23
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Brucelle F, Renaud P. Synthesis of a Leucomitosane via a Diastereoselective Radical Cascade. J Org Chem 2013; 78:6245-52. [DOI: 10.1021/jo4009904] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- François Brucelle
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
| | - Philippe Renaud
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland
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24
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Shirakawa S, Maruoka K. Neue Entwicklungen bei asymmetrischen Phasentransferreaktionen. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201206835] [Citation(s) in RCA: 139] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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25
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Shirakawa S, Maruoka K. Recent developments in asymmetric phase-transfer reactions. Angew Chem Int Ed Engl 2013; 52:4312-48. [PMID: 23450630 DOI: 10.1002/anie.201206835] [Citation(s) in RCA: 520] [Impact Index Per Article: 47.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Indexed: 11/09/2022]
Abstract
Phase-transfer catalysis has been recognized as a powerful method for establishing practical protocols for organic synthesis, because it offers several advantages, such as operational simplicity, mild reaction conditions, suitability for large-scale synthesis, and the environmentally benign nature of the reaction system. Since the pioneering studies on highly enantioselective alkylations promoted by chiral phase-transfer catalysts, this research field has served as an attractive area for the pursuit of "green" sustainable chemistry. A wide variety of asymmetric transformations catalyzed by chiral onium salts and crown ethers have been developed for the synthesis of valuable organic compounds in the past several decades, especially in recent years.
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Affiliation(s)
- Seiji Shirakawa
- Laboratory of Synthetic Organic Chemistry, Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan
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26
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Synthetic Studies on Potent Marine Drugs: Synthesis and the Crystal Structure of 6-tert-butyl-4-phenyl-4H-chromene-2-carboxylic Acid. J CHEM-NY 2013. [DOI: 10.1155/2013/106908] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
4H-Chromene-2-carboxylic acid ester derivatives of renieramycin M might be of use for the structural-activity relationship studies of antitumor antibiotic tetrahydroisoquinoline natural products. Accordingly, 6-tert-butyl-4-phenyl-4H-chromene-2-carboxylic acid, one key intermediate, was synthesized via the condensation of (3E)-2-oxo-4-phenylbut-3-enoate methyl ester with 4-tert-butylphenol in the presence of AuCl3/3AgOTf (5 mol%), followed by cyclodehydration and aqueous hydrolysis. The product was unambiguously shown to the 4H-chromene-2-carboxylic acid by spectroscopy and X-ray crystallographic analysis. A packing diagram of the crystal structure shows that aromaticπ-stacking interactions and O–H⋯O hydrogen bond stabilize the structure in the solid.
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Yoshida A, Akaiwa M, Asakawa T, Hamashima Y, Yokoshima S, Fukuyama T, Kan T. Total synthesis of (-)-lemonomycin. Chemistry 2012; 18:11192-5. [PMID: 22848018 DOI: 10.1002/chem.201202073] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2012] [Indexed: 11/10/2022]
Affiliation(s)
- Atsushi Yoshida
- School of Pharmaceutical Sciences, University of Shizuoka, 52-1 Yada, Suruga-ku, Shizuoka, Japan
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George N, Bekkaye M, Masson G, Zhu J. A Practical, One-Pot Multicomponent Synthesis of α-Amidosulfides and Their Application as Latent N-Acylimines in the Friedel-Crafts Reaction. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100426] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Wu YC, Li HJ, Liu L, Demoulin N, Liu Z, Wang D, Chen YJ. Hafnium Triflate as an Efficient Catalyst for Direct Friedel-Crafts Reactions of Chromene Hemiacetals. Adv Synth Catal 2011. [DOI: 10.1002/adsc.201000930] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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30
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Wu YC, Li HJ, Liu L, Liu Z, Wang D, Chen YJ. Cascade reaction of β,γ-unsaturated α-ketoesters with phenols in trityl chloride/TFA system. Highly selective synthesis of 4-aryl-2H-chromenes and their applications. Org Biomol Chem 2011; 9:2868-77. [DOI: 10.1039/c0ob01143f] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Affiliation(s)
- Wenyi Zhao
- Shasun Pharma Solutions, Incorporated, 10 Knightsbridge Road, Pistcataway, New Jersey 08854, USA
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32
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Wu YC, Zhu J. Asymmetric total syntheses of (-)-renieramycin M and G and (-)-jorumycin using aziridine as a lynchpin. Org Lett 2010; 11:5558-61. [PMID: 19894720 DOI: 10.1021/ol9024919] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
By exploring the triple reactivity of two aziridines and double nucleophilicity of two aromatics, convergent and versatile syntheses of the above four natural products were developed.
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Affiliation(s)
- Yan-Chao Wu
- Centre de Recherche de Gif, Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
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Wu YC, Li HJ, Yang HZ. A sensitive and highly selective fluorescent sensor for In3+. Org Biomol Chem 2010; 8:3394-7. [DOI: 10.1039/c0ob00002g] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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