Odorless, Regioselective Synthesis of Diaryl Sulfides and α-Thioaryl Carbonyls from Sodium Arylsulfinates <i>via</i>
a Metal- Free Radical Strategy in Water
作者:Ya-mei Lin、Guo-ping Lu、Gui-xiang Wang、Wen-bin Yi
DOI:10.1002/adsc.201600846
日期:2016.12.22
Regioselective arylthiolations of aromatic amines, arenols and ketones via C–H bond functionalization have been achieved with I2 and PPh3 in an aqueous system, whereby arylsulfenyl radicals are in situ generated from odorless sodium arylsulfinates. The arylsulfenyl radicals can react with free anilines containing electron‐withdrawing groups and complex substrates (estrone and progesterone). Further
Metal-Free Iodine-Catalyzed Direct Arylthiation of Substituted Anilines with Thiols
作者:Daoshan Yang、Kelu Yan、Wei Wei、Jing Zhao、Mengqi Zhang、Xuguang Sheng、Guoqing Li、Shenglei Lu、Hua Wang
DOI:10.1021/acs.joc.5b00540
日期:2015.6.19
Iodine-catalyzed direct arylthiation of substituted anilines for the synthesis of various diaryl sulfides has been developed under metal- and solvent-free conditions. The present method uses readily available thiols as the arylthiation reagents, and environmentally friendly and inexpensive I-2 as the catalyst. Importantly, no base or ligand was necessary. Such a simple, efficient, and economical transformation provides an attractive approach to various diaryl sulfides in good to excellent yields.
Flavin/I2 catalyzed aerobic oxidative C H sulfenylation of anilines
A flavin/I2 catalyzedaerobic oxidative CH sulfenylation of anilines with thiols under mild reaction conditions is presented for the first time. This metal-free reaction provides an atom-economic pathway to prepare various aryl sulfides with outstanding functional group compatibility. Moreover, it consumes molecular oxygen as the only terminal oxidant and produces environmentally-friendly H2O as the
首次提出在温和的反应条件下,黄素/ I 2催化苯胺与硫醇的好氧氧化C H亚磺酰化反应。这种无金属的反应为制备具有出色官能团相容性的各种芳基硫化物提供了一条原子经济途径。此外,它消耗分子氧作为唯一的终端氧化剂,并产生环保的H 2 O作为唯一的副产物。
Tuning the Electronic Properties of N-Heterocyclic Carbenes
The electron-donating properties of N-heterocyclic carbenes ([N,N'-bis(2,6-dimethylphenyl)imidazol]-2-ylidene and the respective dihydro ligands) with 4,4'-R-substituted aryl rings (4,4'-R=NEt2, OC(12)H(25), Me, H, Br, S(4-tolyl), SO(4-tolyl), SO2(4-tolyl)) were studied. Twelve new N-heterocyclic carbene (NHC) ligands were synthesized as well as the respective iridium complexes [IrCl(cod)(NHC)] and