SYNTHESIS OF INTERMEDIATES FOR STEREOSPECIFIC SYNTHESIS OF α- AND β-C-NUCLEOSIDES: RING CONTRACTION OF PROTECTED 2-O-TRIFLUOROMETHANESULPHONATES OF GALACTO- AND ALTRO-PYRANOSIDES

Article abstract of DOI:10.1016/S0040-4039(00)96272-5

The reactions of sodium azide with methyl 6-O-(tert-butyldiphenyl)silyl-3,4-O-isopropylidene-2-O-trifluoromethanesulphonyl-D-galactopyranosides and with methyl 6-O-(tert-butyldiphenyl)silyl-3,4-O-isopropylidene-2-O-trifluoromethanesulphonyl-α-D-pyranoside