Synthesis of terminal imidazole polyethylene glycol

A series of di-tosylated and mono-tosylate polyethylene glycol were synthesized from polyethylene and p-toluenesulfonyl chloride,and characterized by 1HNMR.Di-terminal and mono imidazole polyethylene glycol were synthesized from di-tosylated or mono-tosylate polyethylene glycol with imidazole,and characterized by 1HNMR.