申请人:Ciba-Geigy Corporation
公开号:US05047557A1
公开(公告)日:1991-09-10
Compounds of the formula I ##STR1## in which Me is Ti, Zr or Hf, R.sub.1 is a group transferable to aldehyde, keto or imine groups, for example methyl, allyl, vinyl or the radical of an enol or enamine, R.sub.2 is, for example, cyclopentadienyl, R.sub.3 and R.sub.4 are, for example, H or alkyl, R.sub.5 is, for example, phenyl and the C(1) and C(2) atoms are chiral and have predominantly one configuration, are suitable for use as chiral reactants for aldehydes, ketones and imines for the preparation of both enantiomers of secondary or tertiary alcohols or tertiary amines.
式I化合物 ##STR1## 其中Me为Ti、Zr或Hf,R1为可转移至醛、酮或亚胺基团的基团,例如甲基、烯丙基、乙烯基或烯醇或烯胺的基团,R2例如为环戊二烯基,R3和R4例如为H或烷基,R5例如为苯基,且C(1)和C(2)原子为手性的并主要具有一种构型,适用于作为手性试剂,用于醛、酮和亚胺的制备,以获得次级或三级醇或三级胺的两种对映异构体。