AN IMPROVED SYNTHESIS OF THE 5-DEOXY-5-(HYDROXYPHOSPHINYL)-D-GLUCOPYRANOSES, AND CRYSTAL STRUCTURES OF 1,2,3,4,6-PENTA-O-ACETYL-5-DEOXY-5--β-D-GLUCOPYRANOSE AND ITS 5- CONGENER

Article abstract of DOI:10.1016/0008-6215(89)85103-1

Treatment of 3-O-acetyl-5-deoxy-5-(dimethoxyphosphinyl)-1,2-O-isopropylidene-α-D-glucofuranose (7) with dihydropyran in the presence of pyridinium p-toluenesulfonate gave the 6-O-(tetrahydropyran-2-yl) derivative in 91percent yield.Ring-enlargement of thi