Phosphahydroquinones and oxaphospholes via carbene annulation and cycloaddition reactions of chromium carbonyl carbene complexes and phosphaalkynes
作者:K.H. Dötz、A. Tiriliomis、K. Harms
DOI:10.1016/s0040-4020(01)87270-7
日期:1993.1
Fischer-type alkoxy(aryl or vinyl)carbene complexes of chromium undergo regiospecific carbene annulation and cycloaddition upon reaction with tert.butyl phosphaacetylene to give highly substituted phosphahydroquinones and/or oxaphospholes. The product distribution is governed by steric and electronic effects arising from the substitution pattern in the carbene ligand. The phosphaannulation products
铬的费歇尔型烷氧基(芳基或乙烯基)卡宾配合物在与叔丁基磷乙炔反应后,会发生区域特异性卡宾环化和环加成反应,得到高度取代的磷氢对苯二酚和/或草磷化氢。产品分布受卡宾配体中取代模式引起的空间和电子效应支配。以高达89%的产率获得诸如磷苯,-萘,-苯并呋喃,-苯并噻吩和-菲骨架之类的磷环化产物,以及至多89%的收率,并且部分地通过X射线衍射表征。