A cascade reaction: ring-opening insertion of dioxaphospholane into lutetium alkyl bonds
作者:Kevin R. D. Johnson、Paul G. Hayes
DOI:10.1039/c3dt52790e
日期:——
constrained dioxaphospholane rings were incorporated into a bis(phosphinimine)carbazole ligand (HL) in an effort to generate an ancillary ligand system that is capable of supporting reactive lutetium alkyl functionalities and resistant to cyclometalation reactivity. This new ligand was used to prepare a lutetium dialkyl species, LLu(CH2SiMe3)2; however, the complex exhibited low thermal stability at ambient
在几何上受约束的二氧杂膦环被掺入双(膦亚胺)咔唑配体(H L)中,以产生能够支持反应性alkyl烷基官能团并抗环金属化反应性的辅助配体体系。该新的配体用于制备a二烷基物质L Lu(CH 2 SiMe 3)2; 然而,该复合物在环境温度下表现出低的热稳定性。发现该二烷基化合物高度易受级联的分子间和分子内反应的影响,该反应导致仅形成不对称的双金属四醇盐配合物。该反应的产物是由二氧杂磷杂环戊烷部分开环插入-碳键而产生的,其特征是通过多核NMR光谱学和单晶X射线衍射来表征的。