Four synthetic routes to poly(L-lactide) with thiol end groups based on ring-opening polymerization of L-lactide (LA) catalysed with tin(II) 2-ethylhexanoate (Sn(Oct)2) are reported. The following alcohols were used as co-initiators of polymerization: 2-sulfanylethan-1-ol, 2-[(2,4-dinitrophenyl)sulfanyl]ethan-1-ol, 2-(tritylsulfanyl)ethan-1-ol and allyl alcohol. End groups introduced into polymers by co-initiators were transformed to thiol groups by a subsequent modification reaction. The efficiencies of the used synthetic methods were evaluated and discussed. The best results were obtained with co-initiator 2-(tritylsulfanyl)ethan-1-ol.
基于以辛酸锡(Sn(Oct)2)催化的L-乳酸(LA)环开聚合,报告了四种合成聚(L-乳酸)具硫醇末端基团的路线。以下醇类被用作聚合的共引发剂:2-硫代乙醇,2-[(2,4-二硝基苯基)硫代]乙醇,2-(三苯基硫代)乙醇和丙烯醇。共引发剂引入的末端基团通过后续修饰反应转化为硫醇基团。评估和讨论了所使用合成方法的效率。最佳结果是由共引发剂2-(三苯基硫代)乙醇获得的。