Dimethyl sulfoxide as a mild oxidant in S–P(O) bond construction: simple and metal-free approaches to phosphinothioates
作者:Jian-Guo Sun、Wei-Zhi Weng、Ping Li、Bo Zhang
DOI:10.1039/c6gc03115c
日期:——
In the presence of dimethylsulfoxide (DMSO) as the mild oxidant and reaction medium, a simple and efficient protocol has been developed for the preparation of phosphinothioates via oxidative dehydrogenative...
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.
A palladium-catalyzed phosphorylation of benzyl ammonium triflates with P(O)H compounds has been developed. Various benzylphosphorus compounds were produced in good to excellent yields with high functional group tolerance. All the three kinds of hydrogen phosphoryl compounds, i.e. H-phosphonates, H-phosphinates and secondary phosphine oxides, were applicable to this reaction. The successful scale-up
The reactions of N‐sulfonylindoles with H‐phosphine oxides under oxidative conditions give a wide range of C‐3 phosphorylated free (NH)‐indoles. Several mild oxidants, such as AgNO3, di‐tert‐butyl peroxide (DTBP), and K2S2O8, can be used to promote this transformation.
在氧化条件下,N-磺酰吲哚与H-氧化膦的反应产生了多种C-3磷酸化的游离(NH)-吲哚。可以使用几种弱氧化剂,例如AgNO 3,过氧化二叔丁基(DTBP)和K 2 S 2 O 8来促进这种转化。
Transition-Metal-Free and Base-Promoted Carbon–Heteroatom Bond Formation via C–N Cleavage of Benzyl Ammonium Salts
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