1
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Bracken C, Baumann M. Synthesis of Highly Reactive Ketenimines via Photochemical Rearrangement of Isoxazoles. Org Lett 2023; 25:6593-6597. [PMID: 37616597 PMCID: PMC10496124 DOI: 10.1021/acs.orglett.3c02556] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Indexed: 08/26/2023]
Abstract
Ketenimines are highly electrophilic species with multiple applications as building blocks in organic synthesis; however, the effective preparation of these versatile entities remains a synthetic challenge. Here we report a continuous photochemical process that generates ketenimines via skeletal rearrangement of trisubstituted isoxazoles. The resulting flow process is noteworthy, as it provides for the first time a straightforward entry into these ketenimines that were previously only observed spectroscopically. The value of this methodology toward heterocyclic transposition reactions is demonstrated by converting isoxazoles via isolable ketenimines into pharmaceutically relevant pyrazoles.
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Affiliation(s)
- Cormac Bracken
- School of Chemistry, University
College Dublin, Science Centre South, Dublin 4, Ireland
| | - Marcus Baumann
- School of Chemistry, University
College Dublin, Science Centre South, Dublin 4, Ireland
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2
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Morphet B, Rees SWP, Haverkate NA, Aziz H, Leung E, Pilkington LI, Barker D. Synthesis and Anti-Proliferative Activity of 5-Benzoyl and 5-Benzylhydroxy Derivatives of 3-Amino-2-Arylcarboxamido-Thieno[2-3- b]Pyridines. Int J Mol Sci 2023; 24:11407. [PMID: 37511173 PMCID: PMC10380547 DOI: 10.3390/ijms241411407] [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: 05/29/2023] [Revised: 07/10/2023] [Accepted: 07/11/2023] [Indexed: 07/30/2023] Open
Abstract
3-Amino-2-arylcarboxamido-thieno[2-3-b]pyridines have been previously described as having potent anti-proliferative activity against MDA-MB-231 and HCT116 cancer cell lines. The mechanism by which these molecules prevent cancer cell growth is proposed to be through interfering with phospholipid metabolism via inhibition of PI-PLC, along with other cellular processes. Previously, 5-cinnamyl derivatives of these thieno[2-3-b]pyridines have been shown to have enhanced anti-proliferative activity compared to compounds lacking this moiety, indicating a tethered aromatic ring is important for this western region of the pharmacophore. Herein, we report the synthesis and biological evaluation of a library of 40 novel thieno[2-3-b]pyridine analogues containing shorter benzoyl or secondary benzyl alcohol tethers at the 5-position, in addition to various substituents on the two phenyl rings present on the molecule. Compounds bearing alcohol functionality had improved efficacy compared to their benzoyl counterparts, in addition to a 2-methyl-3-halogen substitution on the 2-arylcarboxamide ring being important for maximising anti-proliferative activity. The most potent molecules 7h and 7i demonstrated IC50 concentrations of 25-50 nM against HCT116 and MDA-MB-231 cells, a similar level of activity as previous thienopyridine compounds bearing cinnamyl moieties, suggesting that these novel derivatives with shorter tethers were able to maintain potent anti-proliferative activity, while allowing for a more concise synthesis.
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Affiliation(s)
- Bailey Morphet
- School of Chemical Sciences, University of Auckland, Auckland 1010, New Zealand
| | - Shaun W P Rees
- School of Chemical Sciences, University of Auckland, Auckland 1010, New Zealand
| | - Natalie A Haverkate
- School of Chemical Sciences, University of Auckland, Auckland 1010, New Zealand
| | - Hamid Aziz
- Department of Chemistry, Quaid-I-Azam University, Islamabad 45320, Pakistan
- Department of Chemistry, Rawalpindi Women University, Rawalpindi 46300, Pakistan
| | - Euphemia Leung
- Auckland Cancer Society Research Centre, Department of Molecular Medicine and Pathology, University of Auckland, Auckland 1023, New Zealand
| | - Lisa I Pilkington
- School of Chemical Sciences, University of Auckland, Auckland 1010, New Zealand
- Te Pūnaha Matatini, Auckland 1142, New Zealand
| | - David Barker
- School of Chemical Sciences, University of Auckland, Auckland 1010, New Zealand
- The MacDiarmid Institute for Advanced Materials and Nanotechnology, Victoria University of Wellington, Wellington 6012, New Zealand
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3
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Abd El-Lateef HM, Abdelhamid AA, Khalaf MM, Gouda M, Elkanzi NAA, El-Shamy H, Ali AM. Green Synthesis of Novel Pyridines via One-Pot Multicomponent Reaction and Their Anti-Inflammatory Evaluation. ACS OMEGA 2023; 8:11326-11334. [PMID: 37008112 PMCID: PMC10061656 DOI: 10.1021/acsomega.3c00066] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 02/24/2023] [Indexed: 06/19/2023]
Abstract
A functional and environmentally green procedure for the design of novel pyridine 5a-h and 7a-d derivatives through two pathways is presented. The first pathway is via a one-pot, four-component reaction of p-formylphenyl-4-toluenesulfonate (1), ethyl cyanoacetate (2), acetophenone derivatives 3a-h or acetyl derivatives 6a-d, and ammonium acetate (4) under microwave irradiation in ethanol. The advantages of this method are an excellent yield (82%-94%), pure products, a short reaction time (2-7 min), and low-cost processing. The second pathway was obtained by the traditional method with treatment of the same mixture under refluxing in ethanol, which afforded the same products, 5a-h and 7a-d, in less yield (71%-88%) and over a longer reaction time (6-9 h). The constructions of the novel compounds were articulated via spectral and elemental analysis. Overall, the compounds have been designed, synthesized, and studied for their in vitro anti-inflammatory activity using diclofenac as a reference drug (5 mg/kg). The most potent four compounds, 5a, 5f, 5g, and 5h, showed promising anti-inflammatory activity.
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Affiliation(s)
- Hany M. Abd El-Lateef
- Department
of Chemistry, College of Science, King Faisal
University, Al-Ahsa 31982, Saudi Arabia
- Department
of Chemistry, Faculty of Science, Sohag
University, Sohag 82524, Egypt
| | - Antar A. Abdelhamid
- Department
of Chemistry, Faculty of Science, Sohag
University, Sohag 82524, Egypt
- Department
of Chemistry, Faculty of Science, Albaha
University, P.O. Box 1988, Al Baha Saudi Arabia
| | - Mai M. Khalaf
- Department
of Chemistry, College of Science, King Faisal
University, Al-Ahsa 31982, Saudi Arabia
- Department
of Chemistry, Faculty of Science, Sohag
University, Sohag 82524, Egypt
| | - Mohamed Gouda
- Department
of Chemistry, College of Science, King Faisal
University, Al-Ahsa 31982, Saudi Arabia
| | - Nadia. A. A. Elkanzi
- Department
of Chemistry, College of Science, Jouf University, P.O. Box 2014, Sakaka, Saudi Arabia
- Department
of Chemistry, Faculty of Science, Aswan
University, P.O. Box 81528, Aswan, Egypt
| | - Hemdan El-Shamy
- Deanship
of Student Affairs, King Faisal University, P.O. Box 380, Al-Ahsa 31982, Saudi Arabia
| | - Ali M. Ali
- Department
of Chemistry, Faculty of Science, Sohag
University, Sohag 82524, Egypt
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4
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Bandivadekar PV, Gavali KD, Chaturbhuj GU. Sulfated Polyborate Catalyzed Improved Synthesis of Enamines and Enaminones Based Intermediates of Imatinib, Nilotinib and Ocinaplon**. ChemistrySelect 2023. [DOI: 10.1002/slct.202204425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Priyanka V. Bandivadekar
- Department of Pharmaceutical Sciences and Technology Institute of Chemical Technology Matunga, Mumbai India 400 019
| | - Kanchan D. Gavali
- Department of Pharmaceutical Sciences and Technology Institute of Chemical Technology Matunga, Mumbai India 400 019
| | - Ganesh U. Chaturbhuj
- Department of Pharmaceutical Sciences and Technology Institute of Chemical Technology Matunga, Mumbai India 400 019
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5
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One-pot carbonylation-dehydration tandem reaction of aryl iodides with acylhydrazines for synthesis of 2,5-diaryl-1,3,4-oxadiazoles. MONATSHEFTE FUR CHEMIE 2023. [DOI: 10.1007/s00706-022-03021-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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6
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Reaction of 3-Acetylcoumarin: From Methods to Mechanism. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
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7
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Kumar D, Sharma H, Saha N, Chakraborti AK. Domino synthesis of functionalized pyridine carboxylates under gallium catalysis: Unravelling the reaction pathway and the role of the nitrogen source counter anion. Chem Asian J 2022; 17:e202200304. [PMID: 35608137 DOI: 10.1002/asia.202200304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2022] [Revised: 05/11/2022] [Indexed: 11/10/2022]
Abstract
The catalytic potential of various metal Lewis acid catalysts have been assessed to derive a high-yielding, multi-component domino synthesis of functionalized pyridines from (E)-3-(dimethylamino)-1-aryl/heteroaryl-prop-2-en-1-ones, 1,3-dicarbonyl compounds, and an ammonium salt (as the nitrogen precursor). Amongst the various metal halides, tetrafluoroborates, perchlorates, and triflates used as the catalyst GaI3 proved to be the most effective. The mechanistic course of the most plausible pathway has been outlined as the intermediate formation of imine/enamine by the reaction of the 1,3-dicarbonyl compound with ammonia (liberated in situ from the ammonium salt used as the nitrogen source), which participates in the domino nucleophilic Michael reaction to the (2E)-3-(dimethylamino)-1-aryl/hetroarylprop-2-en-1-one by its active methylene carbon through its enamine form followed by intramolecular cyclization and aromatization. The effect of different ammonium salts as the nitrogen source has been investigated and NH4OAc was found to be best. The influence of the acetate counter anion of NH4OAc on the progress of the reaction was studied and its specific role in the cyclization and subsequent aromatization has been revealed. This work offers distinct advantages compared to the literature reported methodologies on the count of several green index parameters.
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Affiliation(s)
- Dinesh Kumar
- National Institute of Pharmaceutical Education and Research, Medicinal Chemistry, Sector 67, 160062, S. A. S. Nagar, INDIA
| | - Himanshu Sharma
- National Institute of Pharmaceutical Education and Research, Medicinal Chemistry, Sector 67, 160062, S. A. S. Nagar, INDIA
| | - Nirjhar Saha
- National Institute of Pharmaceutical Education and Research, Medicinal Chemistry, Sector 67, 160062, S. A. S. Nagar, INDIA
| | - Asit Kumar Chakraborti
- National Institute of Pharmaceutical Education and Research, Medicinal Chemistry, Sector 67, 160062, S. A. S. Nagar, INDIA
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8
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New enaminone sesquiterpenic: TiCl4-catalyzed synthesis, spectral characterization, crystal structure, Hirshfeld surface analysis, DFT studies and cytotoxic activity. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130622] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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9
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Gabbutt CD, Heron BM, Lilly T, Ogwang OW, Zonidis D. Synthesis, C-H bond functionalisation and cycloadditions of 6-styryl-1,2-oxathiine 2,2-dioxides. Org Biomol Chem 2021; 19:6431-6446. [PMID: 34231619 DOI: 10.1039/d1ob01125a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of 6-styryl-1,2-oxathiine 2,2-dioxides have been efficiently obtained by a two-step protocol from readily available (1E,4E)-1-(dimethylamino)-5-arylpenta-1,4-dien-3-ones involving a regioselective sulfene addition and subsequent Cope elimination. Pd-Mediated direct C-H bond functionalisation of the 6-styryl-1,2-oxathiine 2,2-dioxides and a wider selection of 5,6-diaryl substituted 1,2-oxathiine 2,2-dioxides proceeded smoothly to afford C-3 (hetero)aryl substituted analogues and the results are contrasted with those of a complementary bromination - Suzuki cross-coupling sequence. Whilst the cycloaddition of benzyne, derived from in situ fluoride initiated decomposition of 2-(trimethylsilyl)phenyl trifluoromethanesulfonate, to the substituted 1,2-oxathiine 2,2-dioxides resulted in low yields of substituted naphthalenes, the addition of 4-phenyl-1,2,4-triazoline-3,5-dione to the 6-styryl-1,2-oxathiine 2,2-dioxides afforded novel 5,9-dihydro-1H-[1,2]oxathiino[5,6-c][1,2,4]triazolo[1,2-a]pyridazine-1,3(2H)-dione 8,8-dioxides through a silica-mediated isomerisation of the initial [4 + 2] adducts.
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Affiliation(s)
- Christopher D Gabbutt
- Department of Chemical Sciences, School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, UK.
| | - B Mark Heron
- Department of Chemical Sciences, School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, UK.
| | - Thomas Lilly
- Department of Chemical Sciences, School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, UK.
| | - Ochola W Ogwang
- Department of Chemical Sciences, School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, UK.
| | - Dimitrios Zonidis
- Department of Chemical Sciences, School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield, HD1 3DH, UK.
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10
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Fu RG, Wang Y, Xia F, Zhang HL, Sun Y, Yang DW, Wang YW, Yin P. Synthesis of 2-Amino-5-acylthiazoles by a Tertiary Amine-Promoted One-Pot Three-Component Cascade Cyclization Using Elemental Sulfur as a Sulfur Source. J Org Chem 2019; 84:12237-12245. [PMID: 31480831 DOI: 10.1021/acs.joc.9b02032] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A novel one-pot three-component cascade cyclization strategy for the synthesis of 2-amino-5-acylthiazoles using enaminones, cyanamide, and elemental sulfur has been developed. The reported methods have demonstrated good tolerance of various functional groups. Up to 28 2-amino-5-acylthiazole compounds bearing diverse structural differences were successfully synthesized from easily obtained starting materials with moderate to excellent yields. Our method provides an effective way for the access of valuable and potentially bioactive 2-amino-5-acylthiazole derivatives.
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Affiliation(s)
- Rong-Geng Fu
- Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan Key Laboratory of Druggability and Preparation Modification for Traditional Chinese Medicine and TCM and Ethnomedicine Innovation & Development International Laboratory, School of Pharmacy , Hunan University of Chinese Medicine , Changsha 410208 , People's Republic of China
| | - Yong Wang
- Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan Key Laboratory of Druggability and Preparation Modification for Traditional Chinese Medicine and TCM and Ethnomedicine Innovation & Development International Laboratory, School of Pharmacy , Hunan University of Chinese Medicine , Changsha 410208 , People's Republic of China
| | - Fei Xia
- Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan Key Laboratory of Druggability and Preparation Modification for Traditional Chinese Medicine and TCM and Ethnomedicine Innovation & Development International Laboratory, School of Pharmacy , Hunan University of Chinese Medicine , Changsha 410208 , People's Republic of China
| | - Hao-Lin Zhang
- Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan Key Laboratory of Druggability and Preparation Modification for Traditional Chinese Medicine and TCM and Ethnomedicine Innovation & Development International Laboratory, School of Pharmacy , Hunan University of Chinese Medicine , Changsha 410208 , People's Republic of China
| | - Yuan Sun
- Department of Chemistry and Biochemistry , The Ohio State University , Columbus , Ohio 43210 , United States
| | - Duo-Wen Yang
- Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan Key Laboratory of Druggability and Preparation Modification for Traditional Chinese Medicine and TCM and Ethnomedicine Innovation & Development International Laboratory, School of Pharmacy , Hunan University of Chinese Medicine , Changsha 410208 , People's Republic of China
| | - Ye-Wei Wang
- Key Laboratory for Quality Evaluation of Bulk Herbs of Hunan Province, Hunan Key Laboratory of Druggability and Preparation Modification for Traditional Chinese Medicine and TCM and Ethnomedicine Innovation & Development International Laboratory, School of Pharmacy , Hunan University of Chinese Medicine , Changsha 410208 , People's Republic of China
| | - Peng Yin
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Ministry of Education), College of Chemistry and Chemical Engineering , Hunan Normal University , Changsha , Hunan 410081 , People's Republic of China
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11
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Wakade SB, Tiwari DK, Phanindrudu M, Pushpendra, Tiwari DK. Synthesis of 3-keto-quinolines from enaminones, anilines and DMSO: Transition metal free one pot cascade. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.06.030] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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12
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Gao Y, Liu Y, Wan JP. Visible Light-Induced Thiocyanation of Enaminone C–H Bond to Access Polyfunctionalized Alkenes and Thiocyano Chromones. J Org Chem 2019; 84:2243-2251. [DOI: 10.1021/acs.joc.8b02981] [Citation(s) in RCA: 105] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Yong Gao
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P.R. China
| | - Yunyun Liu
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P.R. China
| | - Jie-Ping Wan
- College of Chemistry and Chemical Engineering, Jiangxi Normal University, Nanchang 330022, P.R. China
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13
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Baleeva NS, Zaitseva SO, Mineev KS, Khavroshechkina AV, Zagudaylova MB, Baranov MS. Enamine–azide [2+3]-cycloaddition as a method to introduce functional groups into fluorescent dyes. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.01.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Aiken S, Anozie K, de Azevedo ODCC, Cowen L, Edgar RJL, Gabbutt CD, Heron BM, Lawrence PA, Mills AJ, Rice CR, Urquhart MWJ, Zonidis D. Expedient synthesis of highly substituted 3,4-dihydro-1,2-oxathiine 2,2-dioxides and 1,2-oxathiine 2,2-dioxides: revisiting sulfene additions to enaminoketones. Org Biomol Chem 2019; 17:9585-9604. [DOI: 10.1039/c9ob01657k] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
The addition of sulfenes to substituted enaminoketones, followed by a facile Cope elimination, provides efficient access to a diverse series of 1,2-oxathiine 2,2-dioxides.
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15
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Jyothish Kumar L, Sarveswari S, Vijayakumar V. DMFDMA catalyzed synthesis of 2-((Dimethylamino)methylene)-3,4-dihydro-9-arylacridin-1(2H)-ones and their derivatives: in-vitro antifungal, antibacterial and antioxidant evaluations. OPEN CHEM 2018. [DOI: 10.1515/chem-2018-0110] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
AbstractA series of 3,4-dihydro-9-arylacridin-1(2H)-ones was synthesized and enaminone function was introduced at the C-2 position using DMFDMA catalyst which in turn successfully converted into pyrazole, isoxazol, 1-phenyl-1H-pyrazole by treating it with reagents such as hydrazine, hydroxylamine and phenylhydrazine. These newly synthesized compounds were evaluated for their antibacterial activity against a series of Gram-Positive bacteria including Staphylococcusaureus, Bacilluscereus, StaphylococcusaureusMLS16 and Gram-Negative bacteria including Klebsiellaplanticol, Escherichiacoliand Pseudomonasaeruginosaand also against fungal strains including Candidaalbicans, Candidaparapsilosis, Candidaglabrata, Candidaaaseri, Aspergillusnigerand Issatchenkiahanoiensis. The compounds3aand6aexhibited considerable antifungal activity (MIC value 0.007 and 0.006 μM) against Candidaalbicansand Aspergillusnigerrespectively. The compound4ashowed excellent antibacterial activity towards EscherichiaColi(MIC = 0.003 μM) and the compound5afound to show prominent DPPH radical scavenging activity with EC50value 16.85±1.5μg mL−1.
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Affiliation(s)
- L. Jyothish Kumar
- Centre for Organic and Medicinal Chemistry, School of Advanced Sciences, VIT University, Vellore-632014, Tamil Nadu, India
| | - S. Sarveswari
- Centre for Organic and Medicinal Chemistry, School of Advanced Sciences, VIT University, Vellore-632014, Tamil Nadu, India
| | - V. Vijayakumar
- Centre for Organic and Medicinal Chemistry, School of Advanced Sciences, VIT University, Vellore-632014, Tamil Nadu, India
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16
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Kumar LJ, Vijayakumar V. An efficient solvent-free synthesis of 3-acetyl-4-arylquinoline-based enaminones and its derivatives using DMFDMA reagent. CHEMICAL PAPERS 2018. [DOI: 10.1007/s11696-017-0375-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Zhao Y, Zheng Q, Yu C, Liu Z, Wang D, You J, Gao G. Rh(iii)-Catalyzed regioselective C–H [4 + 2] C-annulation of vinyl enaminones with alkynes to form polysubstituted salicylaldehydes. Org Chem Front 2018. [DOI: 10.1039/c8qo00759d] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Sterically congested polysubstituted salicylaldehydes are accessed through a Rh(iii)-catalyzed regioselective vinylic C–H [4 + 2] C-annulation reaction of vinyl enaminones with alkynes.
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Affiliation(s)
- Yinsong Zhao
- Key Laboratory of Green Chemistry and Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Qinze Zheng
- Key Laboratory of Green Chemistry and Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Chuangui Yu
- Key Laboratory of Green Chemistry and Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Zheng Liu
- Key Laboratory of Green Chemistry and Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Deping Wang
- Key Laboratory of Green Chemistry and Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Jingsong You
- Key Laboratory of Green Chemistry and Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- P. R. China
| | - Ge Gao
- Key Laboratory of Green Chemistry and Technology of Ministry of Education
- College of Chemistry
- Sichuan University
- Chengdu 610064
- P. R. China
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18
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Thiamine supported on core–shell silica magnetic nanoparticles: a highly efficient and recyclable organocatalyst for the silylation of hydroxyl groups. REACTION KINETICS MECHANISMS AND CATALYSIS 2017. [DOI: 10.1007/s11144-017-1199-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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19
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Luo L, Zhou Z, Zhu J, Lu X, Wang H. ZnCl2-promoted Friedländer-type synthesis of 4-substituted 3-aroyl quinolines from o-aminoaryl ketones and enaminones. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.09.087] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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20
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Kalita SJ, Chandra Deka D, Mecadon H. Organocatalytic domino Knöevenagel–Michael reaction in water for the regioselective synthesis of benzo[4,5]imidazo[1,2-a]pyrimidines and pyrido[2,3-d]pyrimidin-2-amines. RSC Adv 2016. [DOI: 10.1039/c6ra21376f] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An organocatalyzed aqueous media domino reaction is developed for the regioselective synthesis of benzo[4,5]imidazo[1,2-a]pyrimidines and pyrido[2,3-d]pyrimidin-2-amines.
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Affiliation(s)
| | | | - Hormi Mecadon
- Department of Chemistry
- University of Gauhati
- Guwahati 781014
- India
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21
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Borah A, Goswami L, Neog K, Gogoi P. DMF Dimethyl Acetal as Carbon Source for α-Methylation of Ketones: A Hydrogenation–Hydrogenolysis Strategy of Enaminones. J Org Chem 2015; 80:4722-8. [DOI: 10.1021/acs.joc.5b00084] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Ashwini Borah
- Medicinal Chemistry Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, India
| | - Limi Goswami
- Medicinal Chemistry Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, India
| | - Kashmiri Neog
- Medicinal Chemistry Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, India
| | - Pranjal Gogoi
- Medicinal Chemistry Division, CSIR-North East Institute of Science and Technology, Jorhat 785006, India
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Tanwar B, Purohit P, Raju BN, Kumar D, Kommi DN, Chakraborti AK. An “all-water” strategy for regiocontrolled synthesis of 2-aryl quinoxalines. RSC Adv 2015. [DOI: 10.1039/c4ra16568c] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
CascadeN-aroylmethylation–reduction–condensation process as novel strategy of “all water chemistry” for first generalized regioselective synthesis of 2-aryl quinoxalines.
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Affiliation(s)
- Babita Tanwar
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Punjab
- India
| | - Priyank Purohit
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Punjab
- India
| | - Banothu Naga Raju
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Punjab
- India
| | - Dinesh Kumar
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Punjab
- India
| | - Damodara N. Kommi
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Punjab
- India
| | - Asit K. Chakraborti
- Department of Medicinal Chemistry
- National Institute of Pharmaceutical Education and Research (NIPER)
- Punjab
- India
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Shi W, Sun S, Wu M, Catano B, Li W, Wang J, Guo H, Xing Y. Highly regioselective synthesis of cis-β-enaminones by 1,4-addition of propiolaldehydes. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2014.11.127] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Raghunadh A, Meruva SB, Mekala R, Raghavendra Rao K, Krishna T, Gangadhara Chary R, Vaikunta Rao L, Syam Kumar U. An efficient regioselective copper catalyzed multi-component synthesis of 1,3-disubstituted pyrazoles. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.03.125] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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25
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Thakur A, Tripathi M, Rajesh UC, Rawat DS. Ethylenediammonium diformate (EDDF) in PEG600: an efficient ambiphilic novel catalytic system for the one-pot synthesis of 4H-pyrans via Knoevenagel condensation. RSC Adv 2013. [DOI: 10.1039/c3ra42410c] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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