An Efficient Synthesis of Vinylphosphonates from Alkyl Cyanoformates, Activated Acetylenes, and Trialkyl Phosphites

Abstract

An efficient synthesis of vinylphosphonates is described. This involves the reaction of alkyl cyanoformates and dialkyl acetylendicarboxylates in the presence of trialkyl phosphites. The ¹H, ¹³C NMR, and ³¹P NMR spectra of vinylphosphonates having different substitution are consistent with the presence of two geometrical isomers.