PROCESS FOR PRODUCING ALDOHEXOPYRANOSE INTERMEDIATE

摘要

A process for producing a tetra-O-acetylaldohexopyranose represented by the formula (VI) which comprises reacting a penta-O-acetylaldohexopyranose represented by the following formula (V) with a mixture of a hydrazine compound represented by R<1>R<2>NNH2 and an organic acid represented by R<3>COOH to selectively remove an acetyl group. In the reaction scheme, Ac represents acetyl; X represents -O- or -S-; R<1> represents hydrogen or C1-6 alkyl and R<2> represents C1-6 alkyl, etc., or R<1> and R<2> are bonded to each other and represent, in cooperation with the hydrazine group, optionally substituted N-aminopyrrolidine, etc.; and R<3> represents C1-6 alkyl.