Condensation between unprotected aldoses and dibenzoylmethane catalyzed by NaHCO(3) in the cosolvents EtOH and H(2)O (4:1) under microwave irradiation gave aryl ketone beta-C-glycosides 6b-i in higher yields (from 50% with C-riboside 6g up to 99% with C-glucoside 6b) and better anomeric selectivities (beta-configuration >95%) in a shorter reaction time (90 min), compared with previous conventional
Synthesis of a small library of oximes and phenylhydrazones of phenyl ketone <i>C</i>-glycosides
作者:Xiaomin Gu、Zhijie Fang
DOI:10.1080/07328303.2016.1227830
日期:2016.6.12
ABSTRACT An efficient and convenient route was developed for the synthesis of oximes, the corresponding O-methylated oximes, and phenylhydrazones from phenyl ketone C-glycosides in medium to high yields. The broad substrate and reagent scope of this method expands the potential of applying phenyl ketone C-glycosides to the synthesis of important bioactive molecules.