Simple magnesium alkoxides: synthesis, molecular structure, and catalytic behaviour in the ring-opening polymerization of lactide and macrolactones and in the copolymerization of maleic anhydride and propylene oxide
作者:Duleeka Wannipurage、Sara D'Aniello、Daniela Pappalardo、Lakshani Wathsala Kulathungage、Cassandra L. Ward、Dennis P. Anderson、Stanislav Groysman、Mina Mazzeo
DOI:10.1039/d3dt00785e
日期:——
The synthesis of two chiral bulky alkoxide pro-ligands, 1-adamantyl-tert-butylphenylmethanol HOCAdtBuPh and 1-adamantylmethylphenylmethanol HOCAdMePh, is reported and their coordination chemistry with magnesium(II) is described and compared with the coordination chemistry of the previously reported achiral bulky alkoxide pro-ligand HOCtBu2Ph. Treatment of n-butyl-sec-butylmagnesium with two equivalents
报道了两种手性大体积醇盐前配体 1-金刚烷基叔丁基苯基甲醇 HOCAd t BuPh 和 1-金刚烷基甲基苯基甲醇 HOCAdMePh 的合成,描述了它们与镁 ( II ) 的配位化学,并与之前报道的配位化学进行了比较非手性大体积醇盐前配体 HOC t Bu 2 Ph。用两当量的 HOCAd t BuPh 外消旋混合物处理正丁基仲丁基镁,选择性地形成单核双(醇盐)配合物 Mg(OCAd t BuPh) ) 2 (四氢呋喃) 2 . 1 H NMR光谱和X射线晶体学表明选择性形成C 2 -对称纯手性非对映体Mg(OC R Ad t BuPh) 2 (THF) 2 /Mg(OC S Ad t BuPh) 2 (THF) 2 。相比之下,空间阻碍较小的 HOCAdMePh 导致双核产物的形成,表明仅部分烷基取代。 测试了单核 Mg(OCAd t BuPh) 2 (THF) 2络合物作为聚酯合成不