Abstract:
In production of polyesters from a Alpha , Alpha Alpha substituted- Beta -propiolactones, amides of acids of phosphorus are used as initiators for the polymerization.
Abstract:
wherein Ar is an aromatic residue, X is a halogen with carbon monoxide and an alkali or alkaline earth metal oxide hydroxide or carbonate in the presence of a metal carbonyl catalyst and in the additional presence of a mixture of water and an alcohol.
A process for preparing an aryl acetic acid which comprises contacting a compound of the formula