Solvent-controlled direct radical oxyphosphorylation of styrenes mediated by Manganese(III)
作者:Guo-Yu Zhang、Cheng-Kun Li、Da-Peng Li、Run-Sheng Zeng、Adedamola Shoberu、Jian-Ping Zou
DOI:10.1016/j.tet.2016.04.013
日期:2016.6
Direct radical oxyphosphorylation of styrenes with diarylphosphine oxides and dialkylphosphites mediated by Mn(OAc)3 is described. The solvent played a key role in this selective difunctionalization reaction.
A copper-catalyzed direct hydroxyphosphorylation of electron-deficient alkenes with H-phosphine oxides and dioxygen is reported. The present reaction, proceeds under mild reaction conditions with good functional group tolerance, affording the facile and efficient synthesis of various β-hydroxyphosphine oxides in a scaled-up manner with moderate to good yields.
oxyphosphorylation of alkenes and alkynes with water for β-ketophosphonates has been developed through the radical coupling under electrochemical conditions. This protocol is compatible with a wide range of alkenes, alkynes, and diarylphosphorus derivatives, and enables the gram-scale synthesis of β-ketophosphonates. The mechanistic study revealed that the P radicals were generated via hydrogen atom transfer (HAT)
Phosphinoyl radical-initiated vicinal hydroxy-phosphorylation of alkenes
作者:Adedamola Shoberu、Shuai-Shuai Li、Guo-Yu Zhang、Da-Peng Li、Jian-Ping Zou
DOI:10.1016/j.tet.2019.130683
日期:2019.11
A protocol of Mn(OAc)(3)-mediated alpha,beta-hydroxy-phosphorylation of alkenes with phosphorus-centered radicals generated from diphenylphosphine oxide is described. A combination of steric and electronic factors played an important role in this reaction. The reactions of styrenes bearing ortho-substituent gave the selective beta-hydroxyphosphine oxide products. (C) 2019 Published by Elsevier Ltd.
Catalyst-free direct difunctionalization of alkenes with H-phosphine oxides and dioxygen: a facile and green approach to β-hydroxyphosphine oxides
A simple and catalyst-free method has been developed for the construction of 6-hydroxyphosphine oxides through direct difunctionalization of alkenes with H-phosphine oxides and dioxygen under mild conditions. Preliminary mechanistic studies indicated that the hydroxyl oxygen atom of 6-hydroxyphosphine oxide originated from the dioxygen and the present reaction might involve a radical process. (C) 2016 Elsevier Ltd. All rights reserved.