BigPatents India

An improved process for the preparation of an alternating polyesteramide : The invention provides a process for the preparation of a polyester amide that is easy and efficient. The process involves the step of reacting an aromatic dihalide of the general formula XI - Ar - X2 with an aminohydroxy compound of the general formula h^N - R - OH wherein R is an alkyl, cycloalkyl, aromaticor heteroaromatic residue, in the presence of carbon monoxide, a catalyst as described herein , base , a ligand consisting of at least one heteroatom selected from the group consisting of N, P, As and S and an organic solvent as defined herein at a temperature range 20-300° C and 0.01 -200 at pressure to obtain the desired product