Stereoselective Formation of<i>Z</i>- or<i>E</i>-Vinyl Thioethers from Arylthiols and Acetylenes under Transition-Metal-Free Conditions
作者:Yunfeng Liao、Shanping Chen、Pengcheng Jiang、Hongrui Qi、Guo-Jun Deng
DOI:10.1002/ejoc.201300727
日期:2013.10
Vinyl sulfide formation with good yield and high regio- and stereoselectivities from thiols and acetylenesunder transition-metal-free conditions is described. Potassium phosphate was used as an effective additive to enhance the reaction yield and selectivity. Z-Vinyl sulfides were predominately formed in the presence of potassium phosphate, whereas E-vinyl sulfides were formed under solvent- and base-free
Alkyne Hydrothiolation Catalyzed by a Dichlorobis(aminophosphine) Complex of Palladium: Selective Formation of cis-Configured Vinyl Thioethers
作者:Roman Gerber、Christian M. Frech
DOI:10.1002/chem.201200388
日期:2012.7.16
Cis all round: Dichlorobis[1‐(dicyclohexylphosphanyl)piperidine]palladium, [(P(NC5H10)(C6H11)2})2Pd(Cl)2], is a highly efficient alkynehydrothiolation catalyst and the first generally applicable system that selectively generates cis‐configured anti‐Markovnikov adducts in excellent yields within only a few minutes at 120 °C in the presence of only 0.05 mol % of the catalyst (see scheme).
全面顺产:二氯双[1-(二环己基膦酰基)哌啶]钯,[[P (NC 5 H 10)(C 6 H 11) 2 }) 2 Pd(Cl) 2 ]是一种高效的炔烃加氢硫基化催化剂,第一个普遍适用的系统,仅在0.05 mol%的催化剂存在下,在120°C的情况下,仅需几分钟即可选择性地以优异的收率生成顺式构型的反马氏复合物(见方案)。
Anti-Markovnikov stereoselective hydroamination and hydrothiolation of (hetero)aromatic alkynes using a metal-free cyclic trimeric phosphazene base
作者:Na Zhao、Chengdong Lin、Lirong Wen、Zhibo Li
DOI:10.1016/j.tet.2019.04.075
日期:2019.6
Hydroamination and hydrothiolation are the most efficient and completely atom-economical process to construct important enamine and vinylsulfide intermediates in pharmaceutical and organic chemistry. The cyclic trimeric phosphazene base (CTPB) showed great catalytic activity for the anti-Markovnikov stereoselective hydroamination and hydrothiolation of alkynes in good to excellent yields. A broad
A thiol-free procedure for regioselective preparation of (Z)-β-alkenyl sulfides via a three-component reaction of aryl/alkyl halides, phenylacetylene, and potassium isopropylxanthate in the presence of copper iodide as a catalyst in polyethylene glycol is reported. In this study, a xanthate salt is used as an odorless source of sulfur. The reactions proceed in a one-pot and single-step pathway with
报道了在碘化铜作为催化剂的聚乙二醇存在下,通过芳基/烷基卤化物、苯乙炔和异丙基黄原酸钾的三组分反应,无硫醇区域选择性制备( Z )-β-烯基硫醚的方法。在这项研究中,黄原酸盐被用作无味的硫源。该反应以一锅单步途径进行,形成使用 NMR 数据鉴定的碳酸氢盐中间体,并专门形成Z异构体。
Synthesis of Vinyl Sulfides by Copper-Catalyzed Decarboxylative C−S Cross-Coupling
作者:Sadananda Ranjit、Zhongyu Duan、Pengfei Zhang、Xiaogang Liu
DOI:10.1021/ol101729k
日期:2010.9.17
A novel method for the synthesis of vinyl sulfides by the decarboxylative cross-coupling of arylpropiolic acids with thiols using copper(I) salts as catalysts has been developed. In the presence of Cul and Cs2CO3, a variety of thiols reacted with arylpropiolic acids to afford the corresponding vinyl sulfides in good to excellent yields with high stereoselectivity for Z-isomers.