Ni-Catalyzed cross-coupling of aryl thioethers with alkyl Grignard reagents <i>via</i> C–S bond cleavage
作者:Dan Zhu、Lei Shi
DOI:10.1039/c8cc03665a
日期:——
A Ni-catalyzed cross-coupling of aryl thioethers with alkyl Grignardreagents, accompanied by the cleavage of the C(aryl)–SMe bond, has been presented. This method is distinguished by its mild conditions and moderate functional group tolerance, such as hydroxyl, halogen, and heterocycles, which should provide a straightforward access to the modification of sulfur-containing molecules.
Organocatalytic visible light mediated synthesis of aryl sulfides
作者:Michal Majek、Axel Jacobi von Wangelin
DOI:10.1039/c3cc41867g
日期:——
Photo-sensitized synthesis of arylsulfides from arenediazonium salts in the presence of eosin Y has been developed. This protocol exhibits high functional group tolerance and a wide substrate scope and is an attractive alternative to the thermal reaction that involves explosive intermediates.
An iridium-catalyzed acylmethylation and a rhodium-catalyzed amidation of naphthalene derivatives are reported, adopting sulfoxonium ylides and dioxazolones as carbene and nitrene transfer agents, respectively. The use of SMe group as a directing group was key to ensure the peri-selective functionalization, and it can be easily removed or diversely transformed to other synthetically useful functionalities
trifluoroacetic anhydride followed by quenching with aqueous NaHCO3 gives 9,9-bis(methylthio)-10-anthraquinone. The dithia dication and/or the corresponding carbodication via through-bondinteraction between sulfonium and sulfenyl sulfur atoms is proposed as an intermediate.