-promoted protocol for the selective and controllable esterification of P(O)OH compounds using O-nucleophiles (alcohols and phenols) as efficient esterification reagents is described. This method features a high efficiency and good functional-group tolerance, meaning a simple way to synthesize a broad spectrum of phosphinic and phosphoric acid esters from basic starting materials with moderate to excellent
efficient phosphorylation of C(sp3)–H bonds of arenes with diaryl phosphinic acids via Bu4NI-catalyzed dehydrogenativecoupling has been developed. This transformation proceeds efficiently under transition-metal-free reaction conditions and represents a straightforward method to prepare valuable organophosphorus compounds from readily available arenes and diaryl phosphinic acids.
Highly Efficient and Convenient Access to Phosphinates via CHCl<sub>3</sub>
-Assisted Direct Phosphorylation between R<sub>2</sub>
P(O)H and ROH by Phosphonium Salt Catalysis
作者:Xiaojun Yu、Song Zhang、Zhiyu Jiang、Hong-Su Zhang、Tianli Wang
DOI:10.1002/ejoc.202000385
日期:2020.5.29
A mild, efficient, convenient, and scalable method to synthesize phosphinatesviadirectphosphorylationbetween R2P(O)H and ROH was developed. Preliminary mechanistic studies suggest that a carbene‐involving process from CHCl3 to CH2Cl2 facilitates the phosphorylation.