Diastereoselective synthesis of diverse 3,2′-pyrrolidinyl bispirooxindoles via 1,3-dipolar cycloaddition reactions of azomethine ylides with exocyclic α,β-unsaturated ketones and <i>in silico</i> studies for prediction of bioactivity
作者:Kartik Dutta、Mukesh Kumar、Sunil K. Ghosh、Amit Das、Raghunath Chowdhury
DOI:10.1080/00397911.2018.1560472
日期:2019.2.1
Abstract A three-component highly regio- and diastereoselective1,3-dipolarcycloaddition reaction between isatin, a series of primary amino acids (10 nos), and exocyclic α,β-unsaturated ketones was developed towards the synthesis of a small library of bispirooxindole (20 nos) at ambient temperature. The developed reaction afforded highly substituted 3,2′-pyrrolidine-bispirooxindole with two vicinal
Synthesis of Indenopyridine Derivatives <i>via</i>
MgI<sub>2</sub>
-Promoted [2+4] Cycloaddition Reaction of <i>In-situ</i>
Generated 2-Styrylmalonate from Donor-Acceptor Cyclopropanes and Chalconimines
作者:Kamal Verma、Prabal Banerjee
DOI:10.1002/adsc.201800598
日期:2018.10.4
An unexpected MgI2‐promoted [2+4] cycloaddition reaction of in‐situ generated 2‐styrylmalonate from donor‐acceptor cyclopropanes with chalconimines to synthesize highly substituted indenopyridine derivatives under the mild reaction conditions have been developed. Additionally, these derivatives were utilized for the synthesis of highly substituted 9‐membered lactam by oxidative C=C bond cleavage and
spiroheterocycles are considered as emerging drug candidates, synthesis of spiroaziridines has not been well explored so far. Herein, we disclose an efficient I2/TBHP mediated diastereoselectivesynthesis of N-alkyl spiroaziridines from primary amines and easily accessible α,β-unsaturated ketones. The reaction is also compatible for the synthesis of 2-aroylaziridines.
BF<sub>3</sub>·Et<sub>2</sub>O mediated one-step synthesis of N-substituted-1,2-dihydropyridines, indenopyridines and 5,6-dihydroisoquinolines
作者:C. T. Fathimath Salfeena、K. T. Ashitha、B. S. Sasidhar
DOI:10.1039/c6ob02133f
日期:——
A simple and efficient one-pot synthesis of N-substituted-1,2-dihydropyridines, indenopyridines and 5,6-dihydroisoquinolines by a BF3·Et2O mediated novel methodology, from easily available α,β-unsaturated ketones/arylidene ketones, phenyl acetylenes and substituted nitriles, has been described. This novel annulation provides quick access to complex polycyclic frameworks with an excellent substrate
Synthesis and in vitro antitumor evaluation of some indeno[1,2-c]pyrazol(in)es substituted with sulfonamide, sulfonylurea(-thiourea) pharmacophores, and some derived thiazole ring systems
作者:Sherif A.F. Rostom
DOI:10.1016/j.bmc.2006.06.020
日期:2006.10
promising broad spectrum antitumor activity against most of the tested subpanel tumor cell lines (GI50 < 100 microM). Compound 3, 4-(3-(4-chlorophenyl)-4H-indeno[1,2-c]pyrazol- 2-yl)-benzenesulfonamide; although it did not show the highest growth inhibitory value (GI50 (MG-MID) 13.2 microM), it proved to be the most active analog in this study with the highest cytostatic and cytotoxic potentials (TGI and