Microwave Assisted Pictet–Spengler and Bischler–Napieralski Reactions
作者:Bikash Pal、Parasuraman Jaisankar、Venkatachalam S. Giri
DOI:10.1081/scc-120021516
日期:2003.1.7
Abstract Pictet–Spengler and Bischler–Napieralskireaction products have been prepared–using microwave irradiation on silicagel support under solvent free condition. Microwave assisted reactions have resulted in better yields of the desired products than prepared under conventional conditions.
An unusual kinetic approach to the Pictet–Spengler reaction was investigated, in which l - or d -tryptophan methyl ester reacted with aldehydes of 1,2- O -cyclohexylidene-3-allyloxy-α- d -xylofuranose, yielding exclusively the cis or trans diastereomer of tetrahydro-β-carboline glycoside, respectively, with complete stereocontrol.