申请人:Merck Patent Gesellschaft mit beschrankter Haftung
公开号:US04937351A1
公开(公告)日:1990-06-26
D-(+)-biotin can be prepared from optically active hydantoins of the formula I ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, X and Y have the meaning given in Patent Claim 1, in a simple, sterospecific manner. Furthermore bicyclic nitriles of the formula XI ##STR2## wherein R.sup.1, R.sup.2, R.sup.3, X and Y have the meaning given represent precious intermediate products and educts of a multitude of possibilities to synthesize optically active D-(+)-biotin.
D-(+)-生物素可以通过式I中的光学活性咪唑酮制备,其中R.sup.1、R.sup.2、R.sup.3、X和Y的含义如专利权要求书中所述,以一种简单、立体特异的方式。此外,式XI中的双环腈,其中R.sup.1、R.sup.2、R.sup.3、X和Y的含义如上所述,代表了合成光学活性D-(+)-生物素的多种可能性的宝贵中间产物和底物。