Storable and Air-Stable Zirconium Complex-Catalyzed Highly Enantioselective Darzens Reaction of Diazoacetamide with Aldehydes
作者:Long He、Wei-Jun Liu、Lei Ren、Tao Lei、Liu-Zhu Gong
DOI:10.1002/adsc.200900845
日期:——
An asymmetric Darzens reaction of aldehydes with diazo‐N,N‐dimethylacetamide (3) catalyzd by an air‐stable and storable chiral zirconium Lewis acid catalyst, which is formed from 3,3′‐diiodobinaphthol and tetrabutoxyzirconium, gives solely the cis‐glycidic amides in high yields with excellent enantioselectivity (up to 97% yield, >99% ee).
醛与重氮,N,N-二甲基乙酰胺(3)的不对称Darzens反应是由3,3'-二碘二萘酚和四丁氧基锆形成的空气稳定且可储存的手性锆路易斯酸催化剂催化的,仅产生顺式-缩水甘油酸高收率的酰胺,具有出色的对映选择性(最高97%收率,> 99%ee)。