Transformations of anilides of 3-aryl-2,3-epoxypropionic acids when exposed to acidic agents
作者:V. A. Mamedov、V. L. Mamedova、G. Z. Khikmatova、A. I. Samigullina、A. T. Gubaidullin、O. B. Bazanova、I. Kh. Rizvanov、O. G. Sinyashin
DOI:10.1007/s11172-015-1238-2
日期:2015.12
Anilides of 3-aryl-2,3-epoxypropionic acids on treatment with aqueous HBr gave 3-aryl-3-bromo-2-hydroxypropionic acid anilides and (in some cases) 2-bromo-3-hydroxy regioisomers. Cyclization of these products into 3-arylquinolin-2(1H)-ones was studied.
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).