Reductive acid-catalyzed rearrangement of 3-(2-nitrobenzyl)quinoxalin-2(1Н)-ones in the presence of Na2S2O4 – effective method for the synthesis of 2-(indol-2-yl)benzimidazoles
作者:Vakhid A. Mamedov、Elena A. Khafizova、Victor V. Syakaev、Olga B. Bazanova、Anastasiya I. Zamaletdinova、Il’dar Kh. Rizvanov、Shamil K. Latypov、Oleg G. Sinyashin
DOI:10.1007/s10593-017-2166-x
日期:2017.9
An effective one-step method is proposed for the synthesis of 2-(indol-2-yl)benzimidazoles from 3-(2-nitrobenzyl)quinoxalin-2(1Н)-ones without using metal catalysts and reagents. This method is based on the Mamedov rearrangement of 3-(2-aminobenzyl)quinoxalin-2(1Н)-ones, formed in situ by the action of Na2S2O4, giving 2-(indol-2-yl)benzimidazoles as the products.
Indolylbenzimidazole‐based ligands catalyze the coupling of arylboronic acids with aryl halides
作者:Meng‐Pei Wang、Chien‐Cheng Chiu、Ta‐Jung Lu、Dong‐Sheng Lee
DOI:10.1002/aoc.4348
日期:2018.6
A novel class of compounds bearing indole and benzimidazole rings was designed and easily synthesized from 2‐indolecarboxylic acid and o‐phenylenediamine. The catalytic system derived from a 2‐indolylbenzimidazole‐based ligand and Pd(OAc)2 in situ could lead to complete conversion of aryl bromides at 0.5 mol% Pd loading under mild reaction conditions. In the presence of a catalyst, sterically hindered
Novel uses of phenanthrenol compounds for improving the appearance and/or texture of the skin.
新型苯并酚化合物的应用,用于改善皮肤的外观和/或质地。
POCl<sub>3</sub>-mediated synthesis of 2-substituted benzimidazolyl-coumarin, benzimidazolyl-indole, and styrylbenzimidazole derivatives
作者:Veerendra Kumar A. Kalalbandi、J. Seetharamappa
DOI:10.1080/00397911.2016.1160412
日期:2016.4.2
ABSTRACT 2-Substituted benzimidazolyl heterocycles and styrylbenzimidazoles have been synthesized by the reaction of substituted o-phenylenediamine with different heterocyclic carboxylic acids and cinnamic acid respectively in the presence of POCl3 as a solvent and catalyst. The proposed reaction has advantageous features of good yields, short reaction times, and operational simplicity. In addition
The present invention relates to the use of polyamide particles as anti-irritant agents for reducing or eliminating the irritant effect of one or more compounds with an irritant effect, preferably in a cosmetic or dermatological composition.