申请人:Lonza, Ltd.
公开号:US05886181A1
公开(公告)日:1999-03-23
Optically active piperazine-2-carboxylic acid derivatives of the general formula: ##STR1## wherein R.sup.1 and R.sup.2 are inter alia hydrogen, alkyl or acyl and X is alkoxy or a (substituted) amino group, are prepared by asymmetric hydrogenation of the corresponding 1,4,5,6-tetrahydropyrazines, catalyzed by optically active rhodium, ruthenium or iridium complexes. The compounds of the Formula 1 are intermediates for the preparation of pharmaceutical active ingredients, for example, HIV protease inhibitors.
光学活性的哌嗪-2-羧酸衍生物的一般式为:##STR1## 其中R.sup.1和R.sup.2是氢,烷基或酰基等,X是烷氧基或(取代的)氨基基团。这些化合物通过由光学活性的铑、钌或铱络合物催化的相应1,4,5,6-四氢吡嗪的不对称氢化制备而成。公式1的化合物是制备药物活性成分的中间体,例如HIV蛋白酶抑制剂。