作者:Eliane Deschamps、François Mathey
DOI:10.1002/chem.200500459
日期:2005.11.18
level indicate that the 2-bromophospholide ion could be stable toward self-arylation as a result of the lowered nucleophilicity of the in-plane phosphorus lone pair (the corresponding sigma(P) orbital is lowered by 0.7 eV compared with the corresponding orbital of the parent phospholide ion, and the negative charge at P is reduced from -0.435 to -0.369 e). Accordingly, the synthesis of 2-bromo-3,4-dimethylphospholide
在B3 LYP / 6-311 ++ G(3df,2p)水平上的DFT计算表明,由于面内磷孤对的亲核性降低,2-溴磷离子对自芳构化可能稳定。与母体磷化物离子的相应轨道相比,相应的sigma(P)轨道降低了0.7 eV,P处的负电荷从-0.435降低至-0.369 e)。因此,通过2-溴-1-(2-乙氧基羰基乙基)-3,4-二甲基磷的定量碱诱导的脱烷基化,成功地进行了2-溴-3,4-二甲基磷化物的合成。该离子与FeCl2反应,生成相应的2,2'-dibromo-3,3',4,4'-四甲基-1,1'-二磷酸二茂铁,为中,外消旋非对映异构体的不稳定混合物,收率18% 。