PURIFICATION OF (S,S)-8-BENZYL-2,8-DIAZABICYCLO4.3.ONONANE USING L-(+) TARTARIC ACID IN ALCOHOL/WATER SOLVENT MIXTURE

摘要

A process for purifying(S,S)-8-benzyl--2,8-diazabicyclo[4.3.0]nonane,(see above formula)comprising:reacting a mixture of (S,S)-8-benzyl-2,8-diazabicyclo--[4.3.0]nonaneand (R,R)-8-benzyl-2,8-diazabicylo--[4.3.0]nonanewith L-(+)-tartaric acid in an alcohol/watersolvent mixture; andconverting (S,S)-8-benzyl-2,8-diazabicyclo-[4.3.0]nonaneL-(+)-tartrate formed in the reacting step into free(S,S)-8-benzyl-2,8-diazabicyclo[4.3.0]nonane by reacting the(S,S)-8-benzyl-2,8-diazabicyclo[4.3.0]nonane L-(+)-tartratewith a base.