Copper(I)-Catalyzed Tandem One-Pot Synthesis of 2-Arylthiobenzothiazoles and 2-Arylthiobenzoxazoles in Water
作者:Xing Liu、Shi-Bo Zhang、Hui Zhu、Zhi-Bing Dong
DOI:10.1021/acs.joc.8b01644
日期:2018.10.5
efficient tandem process for the preparation of 2-arylthiobenzothiazoles has been developed. By condensation of 2-aminobenzenethiol with tetramethylthiuram disulfide (TMTD), 2-mercaptobenzothiazoles was in situ generated, which susequently underwent coupling with iodobenzenes to give the desired 2-arylthiobenzothiazoles fluently in a one-pot manner. This method can also be used for the synthesis of 2-
An efficient and convenient copper-catalyzed oxidative chalcogenation of benzothiazoles and imidazo[1,2-a]pyridines with sulfur/selenium powder and aryl boronic acids was developed. This procedure allows access to a wide range of structurally diverse arylchalcogen-substituted benzothiazoles/imidazo[1,2-a]pyridines in good yields and with good functional group tolerance. A biological evaluation revealed
Inexpensive copper catalysts enabled direct C–H chalcogenations at ambient temperature by means of photo-induced catalysis. The expedient copper catalysis set the stage for C–S and C–Se bond formation from readily accessible non-volatile elemental chalcogens. The photo-assisted copper catalysis manifold proved suitable for a wide range of substrates with good functional group tolerance and exhibited
Cross-coupling reaction of organoalane reagents with 2-mercaptobenzo-5-membered heterocycles for efficient synthesis of benzo-5-membered heterocycle sulfides
作者:Rui-Qiang Luo、Shao Peng Guo、Hong-Liu Xiao、Qing-Han Li
DOI:10.1016/j.tet.2021.132564
日期:2022.1
A highly efficient and simple route for the synthesis of benzo-5-membered heterocycles sulfides has been developed by the cross-couplingreaction of 2-mercaptobenzo-5-membered heterocycles with (hetero)arylaluminum reagents. Various benzo-5-membered heterocycles sulfides derivatives can be obtained with 32–87% isolated yields under mild reaction conditions. The aryls bearing electron-donating or electron-withdrawing
Synthesis of Aryl Sulfides by Metal‐Free Arylation of Thiols with Diaryliodonium Salts under Basic Conditions**
作者:Sudeep Sarkar、Natalia Wojciechowska、Adam A. Rajkiewicz、Marcin Kalek
DOI:10.1002/ejoc.202101408
日期:2022.1.17
Aryl sulfides are synthesized by metal-free arylation of thiols with diaryliodonium salts under basic conditions. The protocol features easy performance, mildconditions, and short reaction time. It provides access to an array of products, including such that contain complex moieties of biological and therapeutic relevance (e. g., heterocycles, a carbohydrate). DFT calculations demonstrate that the
芳基硫化物是在碱性条件下通过硫醇与二芳基碘鎓盐的无金属芳基化合成的。该方案具有性能简单、条件温和、反应时间短等特点。它提供了对一系列产品的访问,包括包含具有生物学和治疗相关性的复杂部分的产品(例如,杂环、碳水化合物)。DFT 计算表明反应通过 Ar 2 I(SR) 中间体的形成进行,然后 C-S 形成还原消除。