A simple approach for copper-promoted S-arylation reactions utilizing triarylbismuths or triarylantimonys as arylating reagents has been described. These reactions can be performed under mild conditions and exhibit remarkable functional group tolerance and chemoselectivity. The corresponding 2-arylthiopyridine 1-oxide derivatives and arylthioanilines/phenols have been successfully synthesized, achieving
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.
Heterogeneous Copper–Catalyzed Synthesis of S–Arylated 2-Aminothiophenols via Ring Opening of Benzothiazoles and C–S Coupling using Aryl Halides
Chelate resins, which are polystyrene-divinylbenezene-based polymers bearing iminodiacetic acids or polyamines as ligands, supported copper catalysts (Cu/CR11 or Cu/CR20) in effectively catalyzing the ring cleaving S-arylation of benzothiazole with aryl iodides or aryl bromides in the presence of lithium tert-butoxide in aqueous 2-propanol.
Palladium-catalyzed C(carbonyl)–C bond cleavage of amides: a facile access to phenylcarbamate derivatives with alcohols
A sulfur-containing auxiliary enabled palladium-catalyzed C(carbonyl)–C bond activation of amides was reported to form phenylcarbamate derivatives with alcohols. Both alkyl and benzyl alcohols could be employed well with yields up to 85%. Derivations from phenylcarbamates to ureas and thiocarbamates illustrated the potential applications of this sequential C–C cleavage/C–O coupling reaction.
Iron-Catalyzed S-Arylation of Benzothiazole with Aryl Iodides under Aqueous Medium: Facile Synthesis of Aryl(2-aminoaryl) Sulfides
作者:Ka Yung、Fuk Kwong、Hang Lee
DOI:10.1055/s-0034-1379484
日期:——
A simple route for facile access of aryl(2-aminoaryl) sulfide was reported. With the aid of iron(III) chloride catalyst and diamine ligand, benzothiazole was efficiently S-arylated with various aryliodides (19 examples) in water under air atmosphere. This operationally simple protocol provides aryl(2-aminoaryl) sulfides in moderate to good yields.