A catalytic cycle was effectively performed in highly stereoselective glycosylation of 1-O-acetyl-D-glucose by using active species generated from respective combinations of Lewis acids (SnCl4, GeCl4, SiCl4, GaCl3, InCl3, and HfCl4) and silver perchlorate.

1,2-cis-Ribofuranosides are stereoselectively prepared in high yields by the reaction of 1-O-acetyl-β-d-ribose with silylated nucleophiles by the promotion of a new catalyst system, the combined use of a catalytic amount of tin(IV) chloride and tin(II) triflate with a stoichiometric amount of lithium perchlorate.

In the presence of a catalytic amount of tin(IV) species generated from tin(IV) chloride and silver perchlorate, 1-O-acetyl-d-glucose stereoselectively reacts with silyl alkoxides to give the corresponding α-glucosides in high yields.

The glycosylation reaction of 1‐O‐acetylribose is investigated under various conditions, using 3‐β‐cholestanol and a variety of silylated nucleophiles.

Enantioselective aldol reaction of ketene silyl acetals with aldehydes is effectively performed by use of a catalytic amount of chiral bissulfonamido zinc(II), easily prepared from diethylzinc and chiral sulfonamides.