reaction of 2,3,4,6-tetra-o-acetyl-1-o-trimethylsilyl-beta-d-glucopyranose ( 4 ) severally with various aliphatic and alicyclic ketones and methyl trimethylsilyl ether , in the presence of catalytic amounts of trimethylsilyl trifluoromethanesulfonate , afforded the corresponding acetylated acetal-beta-glucosides , e.g. , acetone gave 1-methoxy-1-methylethyl 2,3,4,6-tetra-o-acetyl-beta-d-glucopyranoside ( 7a ) .
C0022634
ketones
C0001002
acetone