Copper-catalyzed decarboxylative coupling between α-oxocarboxylic acids and diphenyl disulfides or thiophenols is presented, which provided an effective and direct approach for the preparation of useful thioesters through C(sp2)–S bond formation.
identified for use in Fukuyama cross-coupling reactions. Suitable for storage under air, the POxAP precatalyst allowed reaction between thioesters and organozinc reagents with turnover numbers of ∼90000. A series of 23 ketones were obtained with yields ranging from 53 to 99%. As proof of efficacy, an alternative approach was developed for the synthesis of a key precursor of the natural product isoprekinamycin
Synthesis of Thiol Esters Using Nano CuO/Ionic Liquid as an Eco-Friendly Reductive System Under Microwave Irradiation
作者:Juliano B. Azeredo、Marcelo Godoi、Ricardo S. Schwab、Giancarlo V. Botteselle、Antonio L. Braga
DOI:10.1002/ejoc.201300295
日期:2013.8
We report an efficient, fast, and environmentally friendly method for the synthesis of a wide range of thiolesters using stable diorganoyl disulfides and acyl chlorides, using CuO nanoparticles and [pmim]Br as the reductive system. This method gave good to excellent isolated yields of the desired products after only three minutes of microwave irradiation. Furthermore, by using the same green approach
A Pd/norbornene/Cu cooperative catalysis for the efficientsynthesis of 2-(arylthio)aryl ketones from aryl halides and thioesters has been developed. The first example of cooperative catalysis by palladium, norbornene, and copper, wherein the C(O)-S bond of thioesters is cleaved by a Pd(II) palladacycle with the assistance of CuI, has been observed.
已经开发了一种用于从芳基卤化物和硫酯有效合成 2-(芳硫基)芳基酮的 Pd/降冰片烯/Cu 协同催化。已经观察到钯、降冰片烯和铜协同催化的第一个例子,其中硫酯的 C(O)-S 键在 CuI 的帮助下被 Pd(II) 钯环裂解。
Syntheses of thiol and selenol esters by oxidative coupling reaction of aldehydes with RYYR (Y = S, Se) under metal-free conditions
作者:Chunhuan He、Xuewei Qian、Peipei Sun
DOI:10.1039/c4ob01159g
日期:——
Thiol and selenolesters were synthesized by a direct oxidative coupling reaction of aldehydes with disulfides or diselenides in ethyl acetate under metal-free conditions. Among the oxidants examined, tert-butyl peroxide (TBP) was shown to give the best results. For the substrates with both electron-donating and electron-withdrawing substituents, the reaction proceeded smoothly and gave moderate to