subsequent hydrorhodation of alkynes to provide vinylrhodium intermediates (RCHCH−[Rh]−SAr). In contrast, PdCl2(PhCN)2-catalyzed hydrothiolation of aromatic alkynes (ArC⋮CH) takes place to give the corresponding Markovnikov adducts (R(ArS)CCH2) with excellent regioselectivity, probably via thiopalladation of alkynes by palladium sulfide species (ArS−[Pd]−Cl), which may be formed by ligand-exchange reaction
Highly stereoselective anti-Markovnikov hydrothiolation of alkynes and electron-deficient alkenes by a supported Cu-NHC complex
作者:Yong Yang、Robert M. Rioux
DOI:10.1039/c4gc00642a
日期:——
A robust silica-supported Cu-NHC complex catalyzed highly stereoselective anti-Markovnikov hydrothiolation of alkynes or electron-deficient alkenes to construct C–S bonds.
Copper-catalyzed synthesis of β-haloalkenyl chalcogenides by addition of dichalcogenides to internal alkynes and its application to synthesis of (Z)-tamoxifen
作者:Nobukazu Taniguchi
DOI:10.1016/j.tet.2009.01.094
日期:2009.4
A copper-catalyzed synthesis of β-haloalkenyl sulfides or selenides was carried out by addition of dichalcogenides and tetrabutylammonium halides to internal alkynes. The present reaction anti- and regio-selectively afforded the corresponding alkenyl chalocogenides, and took advantage of both organochalcogenide-groups on dichalcogenide. Furthermore, the reaction under oxygen atmosphere could employ
Benzyne-induced fragmentation of 1,3-oxathiolanes. A novel method for deprotection of carbonyl groups, preparation of phenyl vinyl sulfides, and 1,2-carbonyl transposition
A variety of 1,3-oxathiolanes undergo a benzyne-induced fragmentation leading to phenyl vinylsulfides and carbonyl compounds. The reaction developed here provides a novel method for deprotection of carbonyl compounds from 1,3-oxathiolanes, preparation of phenyl vinylsulfides, and 1,2-carbonyl transposition.
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)。