Herein, by applying visible-light photoredoxcatalysis, we have achieved the catalytic deaminativealkylation of diphenylphosphine and phenyl phosphine with benzylamine-derived Katritzky salts at room temperature. The use of Eosin Y as photoredox catalyst and visiblelight can largely promote the reaction. A series of unsymmetrical tertiary phosphines were successfully synthesized, including phosphines
在此,通过应用可见光光氧化还原催化,我们实现了二苯基膦和苯基膦与苄胺衍生的 Katritzky 盐在室温下的催化脱氨基烷基化反应。使用曙红 Y 作为光氧化还原催化剂和可见光可以大大促进反应。成功合成了一系列不对称的叔膦,包括具有三种不同取代基的膦,这些取代基很难获得。
Radical Phosphorylation of Aliphatic C–H Bonds via Iron Photocatalysis
作者:Guang-Da Xia、Zi-Kui Liu、Yu-Lian Zhao、Feng-Cheng Jia、Xiao-Qiang Hu
DOI:10.1021/acs.orglett.3c01824
日期:2023.7.21
The synthesis of tertiary phosphines(III) has been a long-standing challenge in synthetic chemistry because of inevitable issues including harsh conditions, sensitive organometallic reagents, and prefunctionalized substrates in traditional synthesis. Herein, we report a strategically novel C(sp3)–H bond phosphorylation that enables the assembly of structurally diverse tertiary phosphines(III) from industrial
iron-catalyzed C(sp3)–H phosphorylation reaction enabled by a photoinduced ligand-to-metal charge transfer (LMCT) process. The reaction exhibits remarkably broad substrate scope (>66 examples), including various alkanes, halides, ketones, esters, nitriles, ethers, thioethers, and silanes as viable substrates. Notably, unconventional site selectivity of C–H phosphorylation is achieved, with the occurrence of
carbon–heteroatom bonds. However, its potential application in the formation of carbon and phosphorus remains unexplored. In this study, we present an alkoxide base-promoted reaction system that enables deborylative phosphination of benzylic organoboronates and geminal bis(boronates) via selective C–B bondcleavage. This approach allows for the synthesis of valuable tertiary phosphines in good yields under