Ionic Liquid Tributyl (Carboxymethyl) Phosphonium Bromide as an efficient Catalyst for the Synthesis of bis(indolyl)Methanes under Solvent-Free Conditions
作者:Ardeshir Khazaei、Mohammad Ali Zolfigol、Toktam Faal-Rastegar
DOI:10.3184/174751913x13787959859380
日期:2013.10
A simple green synthesis of bis (indolyl)methanes involved the reaction of indole with aldehydes in the presence of a phosphonium salt ionicliquid as the catalyst. The simple experimental procedures, short reaction times, high yields of product, non-toxic catalyst and the absence of solvent are the advantages of this method.
Enzymatic approach to cascade synthesis of bis(indolyl)methanes in pure water
作者:Yajie Fu、Zeping Lu、Ke Fang、Xinyi He、Huajin Xu、Yi Hu
DOI:10.1039/c9ra10014h
日期:——
A mild, efficient, and green protocol was developed for the synthesis of bis(indolyl)methanes catalyzed by lipase TLIM through the cascade reactions of indole with aldehydes in pure water. This methodology offers many superiorities such as excellent yields, wide substrate range, simple procedure, reusable and minimal amount of catalyst, and the ability to be scaled up.
Room-Temperature Synthesis of Diindolylmethanes Using Silica-Supported Sulfuric Acid as a Reusable Catalyst Under Solvent-Free Conditions
作者:Yan Zhang、Xiang Chen、Jun Liang、Zhi-cai Shang
DOI:10.1080/00397911.2010.505696
日期:2011.8.15
[image omitted] Efficient electrophilic substitution reactions of indoles with various aromatic and aliphatic aldehydes were carried out using a catalytic amount of H2SO4 center dot SiO2 under solvent-free conditions to afford the corresponding bis(indolyl)methanes in excellent yields.