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.
Stereoselective synthesis of novel glyco-pyrano pyrrolidines/pyrrolizidines/indolizidines through intramolecular [3+2] cycloaddition approach
作者:N. Sirisha、R. Raghunathan
DOI:10.1016/j.tetlet.2010.03.002
日期:2010.5
An efficient and stereoselectivesynthesis of novel furo-pyrano pyrrolidine/pyrrolizidine/indolizidine derivatives has been achieved by intramolecular [3+2] cycloadditionreaction of azomethineylide generated in situ from O-allyl sugar-derived aldehyde and different secondary amino acids.