Aluminum chelates supported by β-quinolyl enolate ligands: synthesis and ROP of ε-CL
作者:Peng Wang、Xiaomin Hao、Jianhua Cheng、Jianbin Chao、Xia Chen
DOI:10.1039/c6dt00001k
日期:——
Treatment of tautomers of β-quinolyl ketone-enaminones 1a–6a with AlMe3 afforded β-quinolyl enolato dialkylaluminium complexes LAlMe21b–6b (L = [(2-C9H6N)–CHC(R)–O–], R = CH3 (1b), tBu (2b), Ph (3b), o-tolyl (4b), p-tolyl (5b), p-OMePh (6b)), respectively. 2b reacted with benzyl alcohol to generate the corresponding LAl(OBn)2 complex 2c. Complexes 1b–6b and 2c were characterized by 1H and 13C NMR spectroscopy
用AlMe 3处理β-喹啉基酮-烯胺酮1a-6a的互变异构体,得到β-喹啉基烯醇基二烷基铝配合物LAlMe 2 1b-6b(L = [(2-C 9 H 6 N)–CH C(R)–O– ],R = CH 3(1b),t Bu(2b),Ph(3b),邻甲苯基(4b),对甲苯基(5b),对-OMePh(6b))。2b与苯甲醇反应生成相应的LAl(OBn)2络合物2c。配合物1b-6b和2c的特征在于1 H和13 C NMR光谱,元素分析和单晶X射线衍射分析。测试所有络合物作为ε-己内酯(ε-CL)开环聚合的催化剂前体。结果表明,在80°C存在苯甲醇的条件下,LAlMe 2(1b–6b)对ε-CL的ROP表现出良好的活性,而在没有醇的情况下,LAl(OBn)2 2c表现出比1b更高的催化活性。–6b用于ε-CL的ROP。但是,两种聚合反应都受到较少的控制。动力学研究表明,该催化剂催化了聚合反应的进