2-diazo-N-phenylacetamide 、 1-萘甲醛 在
zirconium complex of (R)-3,3'-diiodo-BINOL on 3 Å MS 作用下,
以
乙腈 为溶剂,
以97%的产率得到(2R,3R)-3-(naphthalen-1-yl)-N-phenyloxirane-2-carboxamide
A highly enantioselective Darzens reaction between diazoacetamides and aldehydes catalyzed by a (+)-pinanediol–Ti(OiPr)4 system
作者:Gang Liu、Daming Zhang、Jian Li、Guangyang Xu、Jiangtao Sun
DOI:10.1039/c2ob27179f
日期:——
A highly efficient enantioselective Darzens reaction of aldehydes with diazoacetamides catalyzed by a (+)-pinanediol–Ti(OiPr)4 system has been developed. The cis-glycidic amides were obtained in high yields and with moderate to excellent enantioselectivity (up to 99%).
已经开发了由(+)-ane二醇-Ti(O i Pr)4系统催化的醛与重氮乙酰胺的高效对映选择性Darzens反应。所述CIS以高收率得到,并与中度至良好的对映选择性(高达99%) -缩水甘油酰胺。
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).