Process for the production of isoindoline derivatives, novel intermediates and process for their production.

摘要

A process for producing a compound of the formula: wherein R<1> is a hydrogen atom, a lower alkyl group or an aralkyl group, and R<2> is a hydrogen atom or a hydroxyl-protecting group, or a salt thereof, which comprises removing from a compound of the formula: wherein R<3> is a hydrogen atom or a hydroxyl-protecting group, R<4> and R<5> which may be the same or different are N-protecting groups selected from the group consisting of lower alkyl groups and aralkyl groups, and X<(-)> is an anion, the N-protecting group(s), if necessary, together with the hydroxyl-protecting group.