Chiral organic catalysts of formula (I)
wherein ar, R1 and R2 are as defined in the description are herein disclosed. these catalysts promote the enantioselective reduction of n-alkyl and n-benzyl- substituted alicyclic and cyclic imines in the presence of trichlorosilane, avoiding the use of metal chitalysts or of metal-free catalysts which suffer from stability problems. the invention also relates to the preparation of the catalysts and to a process for the reduction on n-alkyl and n-benzyl substituted alicyclic and cyclic imines in which the imines are prepared in situ.
式(I)的手性有机催化剂
这些催化剂可促进正烷基和正苄基取代的脂环族和环状
亚胺在三
氯硅烷存在下的对映体选择性还原,避免了使用
金属驰豫催化剂或存在稳定性问题的无
金属催化剂。本发明还涉及催化剂的制备方法,以及原位制备正烷基和正苄基取代的脂环族和环族
亚胺的还原工艺。