Convenient preparative method for synthesis of methyl (Z)-3-aryl-2-(carbobenzoxyamino)acrylates by Wittig?Horner reaction with the use of Et3N as a base
作者:V. I. Tararov、T. F. Savel'eva、Yu. N. Belokon'
DOI:10.1007/bf00696717
日期:1995.11
The Wittig-Horner reaction of CbzNHCH(CO(2)Me)P(O)(OMe)(2) (1) with ArCHO (2) in the presence of Et(3)N as a base affords methyl (Z)-3-aryl-2-(carbobenzoxyamino)acrylate (3) with high degrees of diastereoselectivity (Z)/(E) > 10:1. One recrystallization of the crude product is sufficient to obtain isomerically and chemically pure (Z)-3.