Synthesis of Unsymmetrically Substituted Phosphane Oxides (R<sup>1</sup>R<sup>2</sup>P(O)H) and Phosphinous Acids (R<sup>1</sup>R<sup>2</sup>POH)
作者:Nadine Allefeld、Michael Grasse、Nikolai Ignat'ev、Berthold Hoge
DOI:10.1002/chem.201402425
日期:2014.7.7
substituted phosphinous acids and phosphane oxides featuring at least one electron‐withdrawing pentafluoroethyl group. The presence of a diethylamino function as a protecting group allows a selective reaction of RClPNEt2 (R=CF3, C6F5, C6H5) with LiC2F5. On treatment with para‐toluenesulfonic acid the isolated aminophosphanes R(C2F5)PNEt2 are readily converted into the corresponding phosphinous acids or phosphane
本文描述了具有至少一个吸电子五氟乙基的不对称取代的次膦酸和氧化膦的合成。二乙氨基官能团作为保护基团的存在允许RC1PNEt 2(R = CF 3,C 6 F 5,C 6 H 5)与LiC 2 F 5选择性反应。经对甲苯磺酸处理后,分离出的氨基膦R(C 2 F 5)PNEt 2它们容易分别转化为相应的亚膦酸或氧化膦。氧化物和酸互变异构体之间的互变异构平衡研究表明,(CF 3)(C 2 F 5)POH为稳定的次膦酸,而五氟苯基和苯基衍生物构成了酸和氧化物互变异构体之间的溶剂依赖性平衡。