Bismuth Nitrate-Catalyzed Versatile Michael Reactions
作者:Neeta Srivastava、Bimal K. Banik
DOI:10.1021/jo026550s
日期:2003.3.1
Bismuth nitrate-catalyzed versatile Michael reaction was developed to reduce the complications that characterize the current standard Michael reaction and used for facile preparation of organiccompounds of widely different structures. For example, several substituted amines, imidazoles, thio compounds, indoles, and carbamates were prepared at room temperature by following this method. In contrast
Iodine-catalyzed highly efficient Michael reaction of indoles under solvent-free condition
作者:Bimal K. Banik、Miguel Fernandez、Clarissa Alvarez
DOI:10.1016/j.tetlet.2005.02.044
日期:2005.4
Michael reaction of indoles with unsaturated ketones has been accomplished in the presence of catalytic amount of iodine under solvent-free condition. (c) 2005 Published by Elsevier Ltd.
Michael Addition of Indoles to Enones Catalyzed by a Cationic Iron Salt
作者:Takashi Nishikata、Tsukasa Inishi、Goki Hirata
DOI:10.1055/s-0040-1705997
日期:2021.3
Indoles are one of the most valuable nucleophiles in Michaeladditionscatalyzed by a proper Lewis acid. In this paper, we found that a cationic iron salt is effective to carry out the Michaeladdition of indoles. β-Mono- and disubstituted enones reacted smoothly with indoles under our conditions. The cationic iron catalyst is very active, and the maximum TON was up to 425. Moreover, cationic iron-catalyzed