An efficient three-component reaction of indole, aldehyde, and malononitrile in water catalyzed by a copper(II) sulfonato Salen complex afforded 3-indole derivatives in good to excellent yields up to 97%.
Efficient Synthesis of 3-Substituted Indoles via a Base-Free Copper-Catalysed Three-Component Reaction in Water
作者:Haojie Jiang、Leilei Wang、Jianwei Xie
DOI:10.3184/174751916x14622783380474
日期:2016.6
The preparation of sixteen 3-substituted indoles in good to excellent yields under environmentally friendly conditions has been achieved via a three-componentreaction in water of an indole, an aldehyde and malononitrile (or ethyl 2-cyanoacetate) catalysed by 5 mol% of 2-pyrrolecarbaldiminato-Cu(II).