申请人:Tanabe Seiyaku Co., Ltd.
公开号:US05424446A1
公开(公告)日:1995-06-13
A process for preparing an optically active 4-mercapto-2-pyrrolidone derivative of the formula: ##STR1## wherein a group of the formula: --SR.sup.1 is a protected or unprotected mercapto group, and the group of the formula: .dbd.NR.sup.2 is a protected or unprotected imino group, which comprises subjecting racemic 4-amino-3-mercaptobutyric acid or a salt thereof to optical resolution by using 1-(2,3,4-trichlorophenyl)ethanesulfonic acid, followed by subjecting the product to cyclization reaction after protecting the functional groups thereof, if necessary, and further optionally removing the protecting groups therefrom. The present process is industrially advantageous than conventional processes for preparing optically active 4-mercapto-2-pyrrolidone derivatives which are useful as an intermediate for various medicines such as carbapenem antibacterial agents.
一种制备光学活性的4-巯基-2-吡咯酮衍生物的方法,其化学式为:##STR1## 其中,公式为--SR.sup.1的基团是受保护或未受保护的巯基基团,公式为.dbd.NR.sup.2的基团是受保护或未受保护的亚胺基团,包括通过使用1-(2,3,4-三氯苯基)乙磺酸对外消旋的4-氨基-3-巯基丁酸或其盐进行光学分辨,然后在必要时保护其官能团并进一步进行环化反应,然后再选择性地去除保护基团。这种方法比传统的制备光学活性的4-巯基-2-吡咯酮衍生物的方法更具有工业优势,该衍生物可用作各种药物的中间体,例如碳青霉烯类抗菌药物。