Synthesis of a Reactive Polyester Bearing α,β-Unsaturated Ketone Groups by Anionic Alternating Copolymerization of Epoxide and Bicyclic Bis(γ-butyrolactone) Bearing Isopropenyl Group
作者:Sousuke Ohsawa、Kazuhide Morino、Atsushi Sudo、Takeshi Endo
DOI:10.1021/ma102602e
日期:2011.4.12
copolymerization of 2 with glycidyl phenyl ether (GPE) using PPh3 as an initiator proceeded in a 1:1 alternating manner to give the corresponding polyester 3 bearing α,β-unsaturated ketone groups in the side chains. Prolongation of polymerization time resulted in the production of an insoluble networked copolymer due to reactions of the α,β-unsaturated ketone groups in the side chains. In order to demonstrate
通过1,2,3-丙三羧酸的反应成功地合成了一种新型的双环双(γ-丁内酯)2,8-二氧杂-1-异丙烯基双环[3.3.0]辛烷-3,7-二酮(2)。N,N-二甲基-4-氨基吡啶和CuCl 2的存在下,在140°C时加入甲基丙烯酸和甲基丙烯酸酐。以PPh 3为引发剂,将2与缩水甘油基苯基醚(GPE)进行阴离子开环共聚,以1:1交替的方式进行反应,得到相应的聚酯3在侧链上带有α,β-不饱和酮基。由于侧链中的α,β-不饱和酮基团的反应,聚合时间的延长导致产生不溶的网状共聚物。为了证明共聚物3作为反应性聚合物的潜力,对侧链的α,β-不饱和酮基进行了硫醇的迈克尔加成。