Abstract The preparation of stereoregular isotactic P( l -BnMA) and PLLA by ring-opening polymerization (ROP) of 5-(S)-[(benzyloxycarbonyl)methyl]-1,3-dioxolane-2,4-dione ( l -malOCA) and (S)-5-methyl-1,3-dioxolane-2,4-dione ( l -lacOCA) is reported. The polymerization process was shown to be well controlled using two easily accessible single organocatalyst/initiator systems, pyridine/ l -benzyl(Bn)malate and pyridine/lactic acid (Py·LA) ion pair adducts respectively. The obtained biodegradable polymers displayed narrow dispersity (ĐM) and excellent molar mass control. All ROP reactions were conducted at ambient temperature. The stereoregularity and thermal properties of the materials were thoroughly studied, demonstrating the retention of high levels of isotactic enrichment.

中文翻译：

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使用单一有机催化剂/引发剂系统从 l-乳酸和 l-苹果酸的 O-羧酸酐衍生的全同立构可降解聚酯

摘要 5-(S)-[(苄氧羰基)甲基]-1,3-二氧戊环-2,4-二酮( l -报道了malOCA)和(S)-5-甲基-1,3-二氧戊环-2,4-二酮(l-lacOCA)。分别使用两种易于获得的单一有机催化剂/引发剂系统，吡啶/L-苄基（Bn）苹果酸和吡啶/乳酸（Py·LA）离子对加合物，表明聚合过程得到了很好的控制。获得的可生物降解聚合物显示出窄分散性 (ĐM) 和优异的摩尔质量控制。所有 ROP 反应均在环境温度下进行。对材料的立体规整性和热性能进行了彻底研究，证明了高水平等规富集的保留。