study of various metal trifluoromethanesulfonates as efficient catalysts in the regioselectivereductiveringopening of benzylidene acetals is described, including the effects of solvents, reducing agents, and temperature. These catalysts are found to be effective in cleaving the 4,6‐O‐acetalrings of hexopyranosides at either O4 or O6, respectively. When used in conjunction with a 1 M solution of