Synthesis and Biological Evaluation of Pyrazoline and Pyrrolidine‐2,5‐dione Hybrids as Potential Antitumor Agents
作者:Kalpana Tilekar、Neha Upadhyay、Franz‐Josef Meyer‐Almes、Fulvio Loiodice、Natalia Y. Anisimova、Tatiana S. Spirina、Darina V. Sokolova、Galina B. Smirnova、Jun‐yong Choe、Vadim S. Pokrovsky、Antonio Lavecchia、C S Ramaa
DOI:10.1002/cmdc.202000458
日期:2020.10.5
In search of novel and effective antitumoragents, pyrazoline‐substituted pyrrolidine‐2,5‐dione hybrids were designed, synthesized and evaluated in silico, in vitro and in vivo for anticancer efficacy. All the compounds exhibited remarkable cytotoxic effects in MCF7 and HT29 cells. The excellent antiproliferative activity toward MCF7 (IC50=0.78±0.01 μM), HT29 (IC50=0.92±0.15 μM) and K562 (IC50=47.25±1
In this study, the authors have designed and synthesized a novelseries of 3-acyl-4-aryl-4,5-dihydropyrazoles, with the aim to obtain new potential scaffolds for the inhibition of both isoforms of monoamine oxidase (MAO) enzyme. The synthetic pathway to these compounds includes as a key step the 1,3-dipolar cycloaddition reaction of diazomethane with a chalcone. All the compounds were fully characterized
A new type of C(2)-symmetric chiral bisguanidine was designed as a highly efficient catalyst in the inverse-electron-demandhetero-Diels-Alderreaction of chalcones with azlactones for the first time. A wide variety of gamma,delta-unsaturated delta-lactone derivatives with alpha-quaternary-beta-tertiary stereocenters were obtained in high yields (up to 88%) with excellent enantioselectivities (up to
Highly enantioselective synthesis of γ-substituted butenolides via the vinylogous Mukaiyama–Michael reaction catalyzed by a chiral scandium(iii)–N,N′-dioxide complex
A highly efficient catalytic asymmetric vinylogous Mukaiyama–Michael reaction of the 2-silyloxyfuran with chalcone derivatives, catalyzed by a chiralN,N′-dioxide–scandium(III) complex, has been accomplished which tolerates a wide range of substrates. The reaction proceeds with complete regioselectivities, excellent diastereoselectivities (up to >99 : 1 dr) and good to excellent enantioselectivities
Stand and deliver: The first highly regio‐ and enantioselective bromoamination of chalcones has been developed which proceeds via an unusual bromonium‐based mechanism to deliver the title compounds. Excellent results were obtained using 0.05 mol % of the C2‐symmetric N,N′‐dioxide/scandium(III) complex under mild conditions (see scheme).