Process for preparing oligomers and telechels having carboxy- piperazine units, and new oligomers and telechels of poly(carboxypiperazine)

摘要

A process for preparing oligomers and telechels of poly(carboxy- piperazine) and new oligomers the telechels of poly(carboxy- piperazine), wherein the process involves condensation of piperazine or piperazine-N- carboxylic acid esters or their reaction with piperazine or piperidine derivatives to form an intermediate which is reacted with diphenyl carbonate in the presence of a tertiary amine.