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Sanghavi KN, Kapadiya KM, Sriram D, Kumari J. Regioselective Pd-Catalyzed Suzuki–Miyaura Borylation Reaction for the Dimerization Product of 6-Bromoimidazo[1,2-a]pyridine-2-carboxylate: Mechanistic Pathway, Cytotoxic and Tubercular Studies. Synlett 2023. [DOI: 10.1055/s-0042-1751404] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
AbstractIn the pharmaceutical industry, boronic acid and esters play an important role in API-based synthesis. The most efficient way of preparing various active agents is palladium-catalyzed Suzuki–Miyaura borylation reactions. Herein, we report the formation of dimerization product [6,6′-biimidazo[1,2-a]pyridine]-2,2′-dicarboxamide derivatives 7a–j from 6-bromoimidazo[1,2-a]pyridine-2-carboxylate by employing the same conditions. A regioselective borylation of ethyl 6-bromoimidazo[1,2-a]pyridine-2-carboxylate (3) was examined for the formation of ethyl 6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)imidazo[1,2-a]pyridine-2-carboxylate (4a) but it was found to be directed towards the dimerization product 5. The nitrogen-rich system was incorporated into potential anti-cancer and anti-TB agents through acid amine coupling reactions between acid 6 and various amines (dialkyl/cyclic sec./tert.) to form the final adducts 7. Five derived scaffolds were identified as moderately active in TB activity against the H37Rv strain, while two compounds were found to be particularly potent in NCI-60 anti-cancer screening in nine cancer panels.
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Affiliation(s)
| | | | - Dharmarajan Sriram
- Department of Pharmacy, Birla Institute of Technology and Science-Pilani
| | - Jyothi Kumari
- Department of Pharmacy, Birla Institute of Technology and Science-Pilani
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You H, Vegi SR, Lagishetti C, Chen S, Reddy RS, Yang X, Guo J, Wang C, He Y. Synthesis of Bioactive 3,4-Dihydro-2H-naphtho[2,3-b][1,4]oxazine-5,10-dione and 2,3,4,5-Tetrahydro-1H-naphtho[2,3-b]azepine-6,11-dione Derivatives via the Copper-Catalyzed Intramolecular Coupling Reaction. J Org Chem 2018; 83:4119-4130. [DOI: 10.1021/acs.joc.8b00020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hengyao You
- School of Pharmaceutical Sciences and Chongqing Key Laboratory of Natural Drug Research, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing City, 401331, P.R. China
| | - Srinivas Rao Vegi
- School of Pharmaceutical Sciences and Chongqing Key Laboratory of Natural Drug Research, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing City, 401331, P.R. China
| | - Chandraiah Lagishetti
- School of Pharmaceutical Sciences and Chongqing Key Laboratory of Natural Drug Research, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing City, 401331, P.R. China
| | - Shuo Chen
- School of Pharmaceutical Sciences and Chongqing Key Laboratory of Natural Drug Research, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing City, 401331, P.R. China
| | - R. Santhosh Reddy
- School of Pharmaceutical Sciences and Chongqing Key Laboratory of Natural Drug Research, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing City, 401331, P.R. China
| | - Xiaohong Yang
- School of Pharmaceutical Sciences and Chongqing Key Laboratory of Natural Drug Research, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing City, 401331, P.R. China
| | - Jian Guo
- School of Pharmaceutical Sciences and Chongqing Key Laboratory of Natural Drug Research, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing City, 401331, P.R. China
| | - Chenhui Wang
- School of Pharmaceutical Sciences and Chongqing Key Laboratory of Natural Drug Research, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing City, 401331, P.R. China
| | - Yun He
- School of Pharmaceutical Sciences and Chongqing Key Laboratory of Natural Drug Research, Chongqing University, 55 Daxuecheng South Road, Shapingba, Chongqing City, 401331, P.R. China
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