The controllable phosphorylations of thioesters were developed. When the reaction was catalyzed by a palladium catalyst, aryl or alkenyl phosphoryl compounds were generated through decarbonylative coupling, while the benzyl phosphoryl compounds were produced through deoxygenative coupling when the reaction was carried out in the presence of only a base.
carbon–heteroatom (C–P, C–O, C–S, and C–N) bonds via C–N cleavage of benzyl ammoniumsalts under transition-metal-free conditions was reported. The combination of t-BuOK and 18-crown-6 enabled a wide range of substituted benzyl ammoniumsalts to couple readily with different kinds of heteroatom nucleophiles, i.e. hydrogen phosphoryl compounds, alcohols, thiols, and amines. Good functional group tolerance was demonstrated
Copper-catalyzed C–P cross-coupling of arylmethyl quaternary ammonium salts via C–N bond cleavage
作者:Nutao Li、Feng Chen、Guanghui Wang、Qingle Zeng
DOI:10.1007/s00706-019-02535-y
日期:2020.1
AbstractA ligand-free copper-catalyzed C–P cross-coupling reaction of arylmethyl quaternary ammonium salts and diarylphosphine oxides in air is developed. Arylmethyl quaternary ammonium salts with various functional groups and a variety of dialkyl- and diarylphosphine oxides afford C–P cross-coupling products with good yields. This protocol requires no inert atmosphere, no ligand, and simple operation
Direct phosphorylation of benzylic C–H bonds under transition metal-free conditions forming sp<sup>3</sup>C–P bonds
作者:Qiang Li、Chang-Qiu Zhao、Tieqiao Chen、Li-Biao Han
DOI:10.1039/d2ra02812c
日期:——
Direct phosphorylation of benzylic C–H bonds with secondary phosphine oxides was first realized. The reaction was performed in organo/aqueous biphasic system and under transition metal-free conditions, proceeding via the cross dehydrogenative coupling.
route for carboxylicacidconversion as the alkyl source, enabling highly efficient and practical synthesis of the corresponding value-added organophosphorus compounds with high chemo-selectivity and wide substrate scope, including the late modification of complex APIs (active pharmaceutical ingredients). Moreover, this reaction also indicates a new strategy for converting carboxylicacids into alkenes