Nucleophilic cleavage of the sulfur-sulfur bond by phosphorus nucleophiles. Kinetic study of the reduction of aryl disulfides with triphenylphosphine and water
Synthesis of Sulfonimidamides from Sulfenamides via an Alkoxy‐amino‐λ
<sup>6</sup>
‐sulfanenitrile Intermediate
作者:Edward L. Briggs、Arianna Tota、Marco Colella、Leonardo Degennaro、Renzo Luisi、James A. Bull
DOI:10.1002/anie.201906001
日期:2019.10
few operationally simple methods for their preparation. Here, the synthesis of NH-sulfonimidamides is achieved directly from sulfenamides, themselves readily formed in one step from amines and disulfides. A highly chemoselective and one-pot NH and Otransfer is developed, mediated by PhIO in iPrOH, usingammoniumcarbamate as the NH source, and in the presence of 1 equivalent of acetic acid. A wide
Hydrotalcite is an efficient catalyst for air oxidation of a variety of aromatic, aliphatic and alicyclic thiols in hexane, affording the corresponding disulfides in excellent to quantitative yields under mild and neutral conditions.
An inexpensive combination of common laboratory reagents, dimethyl sulfoxide (DMSO) and chromatographic neutral alumina, gives an efficient, selective, and high-yielding oxidation of aromatic, aliphatic and alicyclic thiols to the corresponding disulfides in excellent yields under relatively mild conditions.
Recently, inexpensive and readily available tBuOK has seen widespread use in transition-metal-free reactions. Herein, we report the use of tBuOK for S–S, S–Se, NN and CN bond formations, which significantly extends the scope of tBuOK in chemical synthesis. Compared with traditional methods, we have realized mild and general methods for disulfide, azobenzenes imine etc. synthesis.
A Facile Oxidation of Thiols to Disulfides Catalyzed by CoSalen
作者:Cheng-Xia Tan、Li-Yan Pan、Guo-Fu Zhang、Yong-Shu Li
DOI:10.1080/10426507.2011.568025
日期:2012.1.1
Abstract A convenient and facile catalytic oxidation of thiols to the corresponding disulfides is described using CoSalen as the catalyst and air as the oxidizing agent. This new approach provides an efficient method for the preparation of symmetrical disulfides in high yields and under mild conditions. [Supplemental materials are available for this article. Go to the publisher's online edition of