作者:José Fuentes、Consolación Gasch、David Olano、M.Ángeles Pradera、Guillermo Repetto、Francisco J. Sayago
DOI:10.1016/s0957-4166(02)00377-4
日期:2002.8
A new stereocontrolled and high yielding synthesis of biologically active polyhydroxyperhydroazelpines is reported starting from easily available glycosylenamines (D-gluco, D-manno, and D-galacto configurations), which are transformed into 1,6-azaanhydropyranose derivatives. O- and N-Deprotection of the latter, followed by reduction with sodium cyanoborohydride, gives the target chiral iminocyclitols. The method is based on the capacity of the dialkoxycarbonylvinyl group to stabilize an amide ion, and the only limitation is the necessity for the starting glycosylenamine to have beta-D-configuration. The inhibitory activity of several intermediate iminocyclitols and aldopyranosylenamines on different alpha- and beta-glycosidases is also reported. (C) 2002 Published by Elsevier Science Ltd.