AbstractA chiral N,N′‐dioxide‐nickel(II) complex‐catalyzed asymmetric amination of 3‐bromo‐3‐substituted oxindoles with anilines has been developed. A series of alkyl or aryl 3‐amino‐indolinones with quaternary stereocenters were obtained in high yields with excellent ee values in one step (up to 99 % yield, up to 96 % ee). The method provided a ready route to optically active intermediates of 3‐amino‐2‐oxindole‐based bioactive compounds. Moreover, a possible transition‐state model is proposed so as to elucidate the origin of the chirality based on the X‐ray crystal structure of the catalyst and the adduct.
Ionic Liquid-Mediated Hydrofluorination of <i>o</i>-Azaxylylenes Derived from 3-Bromooxindoles
The hydrofluorination reaction of 3-bromooxindole using mild HF reagents in an ionic liquid is described. This transformation can operate at room temperature to give a series of 3-substituted 3-fluorooxindole derivatives including racemic BMS 204352 (MaxiPost). The mechanistic study about interactions between HF and 3-butyl-1-methylimidazolium tetrafluoroborate [bmim][BF4] is also discussed on the
3-aryl-indolinones derivatives as antiplasmodial agents: synthesis, biological activity and computational analysis
作者:Ayelen Luczywo、Lucía G. González、Anna C. C. Aguiar、Juliana Oliveira de Souza、Guilherme E. Souza、Glaucius Oliva、Luis F. Aguilar、Juan J. Casal、Rafael V. C. Guido、Silvia E. Asís、Marco Mellado
DOI:10.1080/14786419.2021.1895149
日期:2022.8.3
Next, the inhibitory activity against P. falciparum of 18 compounds were tested, founding six compounds with IC50 < 20 µM. The most active of these compounds was 8c; however, their unsaturated derivative 7c was inactive. Then, a structure-activity relationship analysis was done, founding that focused LUMO lobe on the specific molecular zone is related to inhibitory activity against P. falciparum.