Bromodecarboxylation of (<i>E</i>)-3-Aryl-2-(diethoxyphosphoryl)acrylic Acids: A Facile Route to Diethyl Arylethynylphosphonates
作者:Henryk Krawczyk、Łukasz Albrecht
DOI:10.1055/s-2007-966057
日期:2007.6
Bromodecarboxylation of (E)-3-aryl-2-(diethoxyphosphoryl)acrylic acids leading to diethyl (Z)-2-aryl-1-bromovinylphosphonates has been conducted for the first time. The products have been shown to be useful for the synthesis of diethyl arylethynylphosphonates.
A general and efficient method for the preparation of beta,gamma,gamma-trisubstituted-alpha-phosphono-gamma-lactams is presented for the first time. This approach is based on the Michael addition of diethyl acetamidomalonate to methyl (E)-3-aryl-2-(diethoxyphosphoryl)acrylates. Application of the phosphono-lactams obtained for the preparation of alpha-methylene-gamma-lactams is also reported. (C) 2013 Elsevier Ltd. All rights reserved.