Synthesis of new liophilic functionalized aminomethylphosphine oxides and their acid-base and membrane-transport properties toward acidic substrates
作者:R. A. Cherkasov、A. R. Garifzyanov、A. S. Talan、R. R. Davletshin、N. V. Kurnosova
DOI:10.1134/s1070363209090114
日期:2009.9
A large number of new lipophilic mono- and bisphosphinylamines including those possessing additional potential centers of coordination was synthesized on the basis of the Kabachnik-Fields reaction, and acid-base and membrane transport properties of the synthesized compounds toward the mono- and polybasic carboxylic acids were studied. By their basicity all the synthesized aminophosphine oxides were
在Kabachnik-Fields反应的基础上,合成了许多新的亲脂性单膦酸和双膦胺,包括具有额外潜在配位中心的那些,以及合成的化合物对一元和多元羧酸的酸碱和膜传输特性被研究了。由于它们的碱性,所有合成的氨基膦氧化物均显示出劣于其脂族胺前体。第二次膦基的引入极大地降低了碱性,以致于不可能通过电位法确定p K a。讨论了氨基次膦酰基载体与底物的结构与酸性底物的膜运输效率之间的相互关系。
Reduction of Functionalized Tertiary Phosphine Oxides with BH<sub>3</sub>
作者:Sylwia Sowa、Marek Stankevič、Anna Szmigielska、Hanna Małuszyńska、Anna E. Kozioł、K. Michał Pietrusiewicz
DOI:10.1021/jo502623g
日期:2015.2.6
A direct stereoselective conversion of tertiary hydroxyalkylphosphine oxides to the corresponding tertiary hydroxyalkylphosphineboranes involving facile reduction of the P=O bond by BH3 under mild conditions has been developed. The unprecedented facility of reduction of the strong P=O bond by BH3, a mild reducing agent, has been achieved through an intramolecular P=O center dot center dot center dot B complexation directed by proximal alpha- or beta-hydroxy groups present in the phosphine oxide structures. As established by two chemical correlations, the developed transformation of hydroxyalkylphosphine oxides into hydroxyalkylphosphine-boranes takes place with complete inversion of configuration at P.