A new method of orthoesterification, under kinetic control, at non-anomeric positions. Application to the d-glucose and d-mannose series and selective hydrolysis of the corresponding orthoesters
作者:Mohamed Bouchra、Pierre Calinaud、Jacques Gelas
DOI:10.1016/0008-6215(94)00306-z
日期:1995.2
Abstract The reaction of ketene acetals with d -glucose, d -mannose, and their methyl glycosides is described as a new route to unusual cyclic orthoesters (at non anomeric positions). The reaction proceeds by preferential attack of the reagent on the primary hydroxyl group. The synthesis of strained rings (2,3-diequatorial orthoester) is possible. The resulting methoxyethylidene derivatives are very sensitive