The Lewis acid–surfactant–SiO2-combined (LASSC) nanocatalyst synthesizes BIMs, and has the advantages of being non-toxic, multi-cycle, highly stable and efficient.
Glycerin and CeCl3·7H2O: a new and efficient recyclable medium for the synthesis of bis(indolyl)methanes
作者:Claudio C. Silveira、Samuel R. Mendes、Francieli M. Líbero、Eder J. Lenardão、Gelson Perin
DOI:10.1016/j.tetlet.2009.08.062
日期:2009.11
Glycerin and CeCl3 center dot 7H(2)O were successfully used in recyclable catalytic system for the synthesis of several bis(indolyl)methanes in good to excellent yields through the reaction of indoles with aldehydes. The method is applicable to aliphatic and aromatic aldehydes, and the mixture of glycerin and CeCl3-7H(2)O can be reused up to five times without special treatment and with comparable yields. (C) 2009 Elsevier Ltd. All rights reserved.
Solvent-free multi-component synthesis of unsymmetrical bis(indolyl)alkanes with Lewis acid-surfactant-SiO<sub>2</sub> as nanocatalyst
作者:Zhiqiang Wu、Gang Wang、Zhenliang Li、Enke Feng、Yanping Liang、Haijuan Zhan、Wanyi Liu
DOI:10.1080/00397911.2021.1874016
日期:——
Abstract Herein we report the multicomponent synthesis of the bis(indolyl)methane derivatives in a ball mill. The reaction was carried out under solvent-free conditions using only the Lewis acid-surfactant-SiO2 composite nanocatalyst (LASSC) prepared in situ. The unsymmetrical bis(indolyl) methane derivatives containing nitro or fluorine substitution with a yield of 72%–92% were obtained in a short