Synthesis of 1-Hydroxymethylene-1,1-bis(phosphonic acids) from Acid Anhydrides:Preparation of a New Cyclic 1-Acyloxymethylene-1,1-bis(phosphonic acid)

摘要

In continuing with our work to find new pathways to bis(phosphonate) structures we report on their synthesis from tris(trimethylsilyl) phosphite and acid anhydride.This new synthesis allows a direct access to a 1-hydroxymethylene-1,1-bis(phosphonic acid) functionalised by a carboxylic function on the side chain.Moreover,we describe the formation of an original cyclic bis(phosphonate) obtained from phthalic anhydride.