Organophosphorus‐Catalyzed Deoxygenation of Sulfonyl Chlorides: Electrophilic (Fluoroalkyl)sulfenylation by P
<sup>III</sup>
/P
<sup>V</sup>
=O Redox Cycling
作者:Avipsa Ghosh、Morgan Lecomte、Shin‐Ho Kim‐Lee、Alexander T. Radosevich
DOI:10.1002/anie.201813919
日期:2019.2.25
lyzed deoxygenative O‐atom transfer from sulfonyl chlorides is reported. This C−S bond‐forming reaction is catalyzed by a readily available small‐ring phosphine (phosphetane) in conjunction with a hydrosilane terminal reductant to afford a general entry to sulfenyl electrophiles, including valuable trifluoromethyl, perfluoroalkyl, and heteroaryl derivatives that are otherwise difficult to access. Mechanistic
First ever observation of the intermediate of phosphonium salt and ylide hydrolysis: P-hydroxytetraorganophosphorane
作者:Peter A. Byrne、Yannick Ortin、Declan G. Gilheany
DOI:10.1039/c4cc08644a
日期:——
long-postulated intermediate in phosphonium salt and ylidehydrolysis, has been observed and characterised by low temperature NMR, finally definitively establishing its involvement in these reactions. The results require modification of the previously accepted mechanism for ylidehydrolysis: P-hydroxytetraorganophosphorane is generated directly by 4-centre reaction of ylide with water.