Synthesis and Organocatalytic Ring-Opening Polymerization of Cyclic Esters Derived from <scp>l</scp>-Malic Acid
作者:Ryan J. Pounder、Andrew P. Dove
DOI:10.1021/bm1004355
日期:2010.8.9
The synthesis of 3-(S)-[(benzyloxycarbonyl)methyl]-1,4-dioxane-2,5-dione (BMD) and 3,6-(S)-[di(benzyloxycarbonyl)methyl]-1,4-dioxane-2,5-dione (malide) from commercially available l-malic acid is reported. Ring-opening polymerization (ROP) studies of BMD are reported showing that the controlled ROP of this monomer is possible in the absence of transesterification side reactions, despite the presence
3-(S)-[(苄氧羰基)甲基] -1,4-二恶烷-2,5-二酮(BMD)和3,6-(S)-[二(苄氧羰基)甲基] -1,4的合成-l二恶烷-2,5-dione(malide)购自市售l报道了-苹果酸。据报道,BMD的开环聚合(ROP)研究表明,使用1-(3,5-双(三氟甲基) )苯基)-3-环己基硫脲和(-)-天冬氨酸催化聚合。该系统对苹果酸的ROP无效。对引发物种的作用的研究表明,与空间因素相比,醇的电子性质对最终分子量和引发剂效率具有更大的影响。使用H所得的聚(BMD)的脱保护2和Pd / C导致的亲水性聚(glycolic-共-苹果酸(PGMA),能够在稀H 2 O溶液中进行自催化降解,因此在6天内观察到了完全降解。