Coupling of thiols and aromatic halides promoted by diboron derived super electron donors
作者:Mario Franco、Emily L. Vargas、Mariola Tortosa、M. Belén Cid
DOI:10.1039/d1cc05294b
日期:——
We have proven that pyridine–boryl complexes can be used as superelectron donors to promote the coupling of thiols and aromatic halides through a SRN1 mechanism. The reaction is efficient for a broad substrate scope, tolerating heterocycles including pyridines, enolizable or reducible functional groups. The method has been applied to intermediates in drug synthesis as well as interesting functionalized
我们已经证明,吡啶-硼基复合物可用作超电子供体,通过 S RN 1 机制促进硫醇和芳族卤化物的偶联。该反应适用于广泛的底物范围,可耐受杂环,包括吡啶、可烯醇化或可还原的官能团。该方法已通过受控和连续的分子内电子转移过程应用于药物合成中的中间体以及有趣的功能化聚硫醚。
Microwave-assisted Ullmann-Buchwald C-S bond formation using a copper(I) catalyst and trans-cyclohexane-1,2-diol as ligand
作者:Mark C. Bagley、Vincenzo Fusillo、Edward G. B. Hills、Alex T. Mulholland、Joseph Newcombe、Leanne J. Pentecost、Emily L. Radley、Bethan R. Stephens、Christopher C. Turrell
DOI:10.3998/ark.5550190.0013.720
日期:——
aryl halide (1 equiv.) in 2propanol at 120 °C for three hours in the presence of K2CO3 (2 equiv.) as base usingcopper(I) iodide as catalyst (5 mol%) and trans-cyclohexane-1,2-diol (2 equiv.) as ligand provides a rapid and convenient method for C−Sbondformation. The process is most efficient using thiophenol and aryl iodide precursors, both of which may contain electron-donating and electronwithdrawing
Copper-Catalyzed Sulfenylation of Boronic Acids with Sulfonyl Hydrazides
作者:Ting-Ting Wang、Fu-Lai Yang、Shi-Kai Tian
DOI:10.1002/adsc.201400995
日期:2015.3.23
bonds has been developed using sulfonyl hydrazides as sulfenyl sources. A range of sulfonyl hydrazides underwent tetrakis(acetonitrile)copper(I) tetrafluoroborate [Cu(CH3CN)4BF4]/2,2′‐bipyridine‐catalyzed sulfenylation with boronic acids under air to give structurally diverse thioethers in moderate to good yields. Preliminary mechanistic studies show that sulfonyl hydrazides are subjected to decomposition
A General Procedure for the Regioselective Synthesis of Aryl Thioethers and Aryl Selenides Through C-H Activation of Arenes
作者:Chih-Lun Yi、Tsung-Jui Liu、Jun-Hao Cheng、Chin-Fa Lee
DOI:10.1002/ejoc.201300248
日期:2013.6
A generalprocedure for the synthesis of aryl thioethers and aryl selenides in one-pot through sequential iridium-catalyzed C–H borylation and copper-promoted C–S and C–Se bond formation is described. Functional groups including chloro, nitro, fluoro, trifluoromethyl, and nitrogen-containing heterocycles were all tolerated under the reaction conditions. Importantly, not only aryl thiols and selenides