the increased stability of the C2-O-TMS relative to the rest of the TMS ethers on the monosaccharide allowed a final conversion to an ester using catalytic TMSOTf and acid anhydride. By combining ...

In some cases, an epoxide is used instead of the alcohol; or an acid halide or anhydride replaces the acid. Less often, an alkyl or aryl halide is treated with a carboxylate salt. But these methods ...