申请人:Syntex (U.S.A.) Inc.
公开号:US05231181A1
公开(公告)日:1993-07-27
The invention provides a process for preparing single enantiomers of compounds represented by the formula: ##STR1## and chiral acid addition salts thereof; wherein: X and Y are independently hydrogen; lower alkyl; lower alkoxy; or halo; or X and Y taken together is methylenedioxy or ethylene-1,2-dioxy; which includes reduction of a compound represented by the formula: ##STR2## to give a mixture of stereoisomers represented by the formula: ##STR3## wherein each wavy line independently represents a bond in either the .alpha. or .beta. position; followed by dissolving the mixture of stereoisomers and a chiral resolving acid in a suitable solvent and allowing the solution to crystallize, giving a salt of the desired enantiomer.
该发明提供了一种制备由以下式表示的化合物的单对映异构体的过程:##STR1##及其手性酸盐;其中:X和Y独立地为氢;较低的烷基;较低的烷氧基;或卤素;或X和Y一起为亚甲二氧基或乙烯-1,2-二氧基;包括将由以下式表示的化合物还原为给出由以下式表示的立体异构体混合物:##STR2##以给出由以下式表示的立体异构体混合物:##STR3##其中每个波浪线独立地表示α或β位置中的键;然后将立体异构体混合物和手性分离酸溶解在适当的溶剂中并允许溶液结晶,得到所需对映异构体的盐。