Efficient synthesis and characterisation of a series of aryl benzyl NH-sulfoximines are described. While N-protected versions of aryl benzyl sulfoximines have been previously described, reports of their de-protection are very limited, presumably due to lability under the typically harsh deprotection conditions which can be employed with the less reactive aryl alkyl derivatives. Use of N-cyanosulfoximines as key intermediates overcomes these difficulties leading to an effective synthetic route to these compounds. (C) 2009 Elsevier Ltd. All rights reserved.
A KOH-promoted unusual deoxidative coupling reaction of β-sulfinyl esters with benzylic trimethylammonium salts to produce thioethers is discovered for the first time. If quaternary ammonium salts synthesized from enantiomerically enriched amines are adopted, highlyenantiomerically enriched benzyl thioethers (>95–99% ee) with configurations opposite to those of the enantiomerically enriched amines
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。
Regioselective reaction of fluorinated aryllithium reagents and carbon disulfide in cyclopentyl methyl ether: Efficient synthesis of dithioesters and liquid crystal compounds having a difluoromethyleneoxy moiety
Regioselective reaction (carbophilic over thiophilic attack) of several (o-fluorophenyl)lithium reagents with carbon disulfide was achieved to furnish dithioesters in good yields after alkylation, which are useful precursors of liquid crystal compounds having a difluoromethyleneoxy (-CF2O-) group. Running the reaction in the presence of a copper(I) salt catalyst and cyclopentyl methyl ether as a solvent
Nickel(II)‐Catalyzed Reductive Coupling of Xanthate Esters with Sulfur‐Containing and Selenium‐Containing Compounds: Synthesis of Unsymmetric Sulfides and Selenides
作者:Jia‐Hui Han、Daopeng Sheng、Yi‐Rong Chen、Xiao‐Yue Shuai、Weidong Rao、Shu‐Su Shen、Shun‐Yi Wang
DOI:10.1002/cjoc.202400326
日期:2024.10.15
Unsymmetric sulfides and selenides have great applications in the pharmaceutical field. Herein, we describe the reductive coupling reaction of xanthate esters with sulfur-containing and selenium-containing compounds (thio(seleno)sulfonates and disulfides(selenides)) under the nickel-catalyzed condition. It provides a mild and effective method for the synthesis of unsymmetric sulfides and selenides