摘要:
Enzymically catalysed, partial deacetylation of the 5,6-diacetates of 3-deoxy-1,2-O-isopropylidene-alpha-D-ribo-hexofuranose and 1,2-O-isopropylidene-alpha-D-gluco- and -allo-furanose with different substituents at C-3 (OAc, OMe, NHAc) gives the 5-acetate, which migrates rapidly to give the 6-acetate. The initial rate of deacetylation depends on the size of the 3-substituent and the configuration at C-3.