An efficient ligand-free C−S cross-coupling of aryl halides with aromatic/alkyl thiols has been developed using a catalytic amount of nanocrystalline indium oxide as a recyclable catalyst with KOH as the base in DMSO at 135 °C. A variety of aryl sulfides can be synthesized in excellent yields utilizing this protocol.
protocol for the purple light-mediated anti-Markovnikov functionalization of alkenes with thiols. Crucial to the generation of the thiyl radical was the formation of a key photo-active complex. More than 30 thioether products were obtained, demonstrating tolerance towards different functional groups and scalability up to 5 mmol of alkene. Two different reaction conditions have been developed, varying
precursors has been developed to construct sulfides, disulfides, selenides, sulfoxides and sulfones. Combining this deacylative process with SN2 or coupling reactions provides novel and convenient modular approaches toward unsymmetrical or symmetrical disulfides.
已经开发出一种使用无张力甲基酮作为自由基前体的温和光催化脱酰策略来构建硫化物、二硫化物、硒化物、亚砜和砜。将此脱酰过程与 S N 2 或偶联反应相结合,为不对称或对称二硫化物提供了新颖且方便的模块化方法。
Indium-Catalyzed C−S Cross-Coupling of Aryl Halides with Thiols
Indium-catalyzed C-S cross-coupling of aromatic and alkane thiols with aryl halides proceeds smoothly in the presence of In(OTf)(3) (10 mol %), TMEDA (20 mol %), and KOH as a base in DMSO at 135 degrees C. When this protocol was utilized, a variety of thiols could be cross-coupled with aryl halides to afford the corresponding aryl sulfides in good to excellent yields.