Synthesis of benzyl sulfides<i>via</i>substitution reaction at the sulfur of phosphinic acid thioesters
作者:Yoshitake Nishiyama、Takamitsu Hosoya、Suguru Yoshida
DOI:10.1039/d0cc02039g
日期:——
An ambident electrophilicity of phosphinicacid thioesters is disclosed. Unexpected carbon-sulfur bond formation took place in the reaction between phosphinicacid thioesters and benzyl Grignard reagents. The developed method for benzyl sulfides has a wide substrate scope and was applicable for the synthesis of a drug analog.
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
A Simple Synthesis and Some Synthetic Applications of Substituted Phosphide and Phosphinite Anions
作者:E. N. Tsvetkov、N. A. Bondarenko、I. G. Malakhova、M. I. Kabachnik
DOI:10.1055/s-1986-31510
日期:——
Based on data for the acidity relationship of phosphines and phosphinous acids and water in dimethyl sulfoxide and water, a simple method is reported for the generation of phosphide and phosphinite anions by the action of concentrated aqueous alkali on primary and secondary phosphines as well as phosphinous acids in dimethyl sulfoxide or other dipolar aprotic solvents. Alkylation of the anion yields secondary and tertiary phosphines, polyphosphines, functionally substituted phosphines as well as similarly substituted phosphine oxides. Phosphinous acids have been alkylated in various solvents in two-phase systems containing concentrated aqueous alkali and tetrabutylammonium iodide as phase transfer catalyst.
Process for the extraction of dilute amounts of carboxylic acids from liquid solutions
申请人:THE HALCON SD GROUP, INC.
公开号:EP0156597A2
公开(公告)日:1985-10-02
A process for the extraction of dilute amounts of carboxylic acids, particularly acetic acid, from liquid solutions involving contacting the acid containing solution in an acid extraction zone with an insoluble extractive support, which is preferably a crosslinked polystyrene resin, derivitised with a suitable amount of either trihydrocarbyl phosphine oxide or heterocyclic amine absorption sites.
Ligand-Free Iron-Catalyzed Construction of C–P Bonds via Phosphorylation of Alcohols: Synthesis of Phosphine Oxides and Phosphine Compounds
作者:Liguang Gan、Changxu Ye、Tianshu Pi、Lingling Wang、Chunya Li、Long Liu、Tianzeng Huang、Tieqiao Chen、Li-Biao Han
DOI:10.1021/acs.joc.4c00439
日期:2024.5.17
bonds via the iron-catalyzed phosphorylation of alcohols under ligand-free conditions is disclosed. This strategy represents a straightforward process to prepare a series of phosphine oxides and phosphine compounds in good to excellent yields from the readily available alcohols and P–H compounds. A plausible mechanism is also proposed. We anticipate that this mode of transforming simple alcohols would