A new protocol was developed to synthesize (enantioenriched) thioethers and selenoethersfrom (chiral) benzylic trimethylammonium salts and di(hetero)aryl disulfides or diselenides. These syntheses were promoted by the presence of weak base and did not require the use of any transition metal, and resulted in the target products with good to excellent yields (72–94%). Using quaternary ammonium salts
Metal-free sp<sup>3</sup>C–H functionalization: a novel approach for the syntheses of selenide ethers and thioesters from methyl arenes
作者:Satpal Singh Badsara、Yi-Chen Liu、Ping-An Hsieh、Jing-Wen Zeng、Shao-Yi Lu、Yi-Wei Liu、Chin-Fa Lee
DOI:10.1039/c4cc04503c
日期:——
A DTBP-promoted, operationally simple, metal-free and solvent-free formation of C–Se and C–S bonds through sp3C–H functionalization of methyl arenes with diselenides and disulfides is described.
Ionic liquid: an efficient and recyclable medium for synthesis of unsymmetrical diorganyl selenides promoted by InI
作者:Senthil Narayanaperumal、Eduardo E. Alberto、Fabiano Molinos de Andrade、Eder J. Lenardão、Paulo S. Taube、Antonio L. Braga
DOI:10.1039/b910699e
日期:——
In an environmentally friendly protocol, InI was used as a reducing agent for the Se–Se bond to prepare unsymmetrical diorganyl selenides with very short reaction times, mild conditions and excellent yields using (bmim)BF4 as a recyclable solvent.
We report the first metal-free selenolations of pyridinium salts with diselenides to prepare unsymmetrical organoselenides catalysed by visible light. This protocol is an efficient and green method for the preparation of unsymmetrical organoselenides because metal-free conditions and readily accessible diselenides are used.
A highly efficient heterogeneous ruthenium(III)-catalyzed reaction of diaryl diselenides with alkyl halides leading to unsymmetrical diorganyl selenides
作者:Qiurong Chen、Pingping Wang、Tao Yan、Mingzhong Cai
DOI:10.1016/j.jorganchem.2017.04.004
日期:2017.7
A highly efficient heterogeneous ruthenium(III)-catalyzed reaction of diaryldiselenides with alkyl halides was achieved in DMF at 100 °C in the presence of 2 mol% of an MCM-41-immobilized bidentate nitrogen ruthenium(III) complex [MCM-41-2N-RuCl3] and zinc, yielding a variety of unsymmetrical diorganyl selenides in good to excellent yields. This new heterogeneous ruthenium catalyst can easily be prepared