Glycerol as a promoting medium for electrophilic activation of aldehydes: catalyst-free synthesis of di(indolyl)methanes, xanthene-1,8(2H)-diones and 1-oxo-hexahydroxanthenes
β-cyclodextrin hydrate has been investigated towards the eco-compatible synthesis of bis-(indolyl)methanes in aqueous medium by the chemoselective reaction of indoles with differently substituted aryl and alkyl aldehydes under mild reaction conditions. The catalytic attributes of β-cyclodextrin hydrate were also demonstrated through molecular docking and DFT studies. Reactions were slower in D2O than in H2O
Glycerol as a promoting medium for electrophilic activation of aldehydes: catalyst-free synthesis of di(indolyl)methanes, xanthene-1,8(2H)-diones and 1-oxo-hexahydroxanthenes
作者:Fei He、Peng Li、Yanlong Gu、Guangxing Li
DOI:10.1039/b916015a
日期:——
Glycerol was used, for the first time, as a green and effective promoting medium for electrophilic activation of aldehydes, and with which, a catalyst-free system for some reactions that conventionally carried out using acid catalysts, such as synthesis of di(indolyl)methanes, 3,4,5,6,7,9-hexahydro-9-aryl-1H-xanthene-1,8(2H)-dione and 1-oxo-hexahydroxanthenes, was developed.
The Lewis acid–surfactant–SiO2-combined (LASSC) nanocatalyst synthesizes BIMs, and has the advantages of being non-toxic, multi-cycle, highly stable and efficient.