3-氰基苯甲醛 、 2-diazo-N-phenylacetamide 在
zirconium complex of (R)-3,3'-diiodo-BINOL on 3 Å MS 作用下,
以
乙腈 为溶剂,
以95%的产率得到(R,R)-3-(3-cyanophenyl)-N-phenyloxirane-2-carboxamide
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 Darzensreaction 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).