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。