EFFICIENT TOTAL SYNTHESIS OF THE NATURAL PRODUCTS 2,3,4,6-TETRA-O-GALLOYL-D-GLUCOPYRANOSE, 1,2,3,4,6-PENTA-O-GALLOYL-BETA-D-GLUCOPYRANOSE AND THE UNNATURAL 1,2,3,4,6-PENTA-O-GALLOYL-ALPHA-D-GLUCOPYRANOSE

摘要

A short synthesis of the natural products 2,3,4,6-tetra-O-galloyl-D-glucopyranose (8). 1,2,3,4,6-penta-O-galloyl-beta-D-glucopyranose (10) and the unnatural 1,2,3,4,6-penta-O-galloyl-alpha-D-glucopyranose (13) was achieved based on a efficient esterification reaction of the benzylated galiic acid 5 with the alpha,beta-glucopyranoses 11 and 4, respectively. (C) 1997 Elsevier Science Ltd. [References: 25]