Silicananoparticles as a reusable catalyst: a straightforward route for the synthesis of thioethers, thioesters, vinyl thioethers and thio-Michael adducts under neutral reaction conditions
作者:Subhash Banerjee、Jayanta Das、Richard P. Alvarez、Swadeshmukul Santra
DOI:10.1039/b9nj00399a
日期:——
A simple and straightforward route for the synthesis of thioethers, thioesters, vinyl thioethers and thio-Michael adducts has been demonstrated using silica nanoparticles (NPs) as a reusable catalyst via the 1,2-addition of thiols to alkenes, alkynes and alkyl/acyl halides, and the 1,4-addition of thiols to conjugated alkenes at room temperature.
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.
Nickel(II) Chloride-Catalyzed Regioselective Hydrothiolation of Alkynes
作者:Valentine P. Ananikov、Denis A. Malyshev、Irina P. Beletskaya、Grigory G. Aleksandrov、Igor L. Eremenko
DOI:10.1002/adsc.200505168
日期:2005.12
of PhSH to alkynes (HC≡C-R) has been performed using easily available nickel complexes. The non-catalytic side reaction leading to anti-Markovnikov products was suppressed by addition of γ-terpinene to the catalytic system. The other side reaction leading to the bis(phenylthio)alkene was avoided by excluding phosphine and phosphite ligands from the catalytic system. It was found that catalytic amounts
使用容易获得的镍络合物,将PhSH的区域选择性Markovnikov型加成到炔烃(HC≡CR)中。通过向催化体系中添加γ-萜品烯抑制了导致抗马尔科夫尼科夫产物的非催化副反应。通过从催化体系中排除膦和亚磷酸酯配体,避免了导致双(苯硫基)烯烃的另一副反应。发现催化量的Et 3 N显着提高了催化反应的产率和选择性。在最佳条件下,各种炔烃[R = n -C 5 H 11,CH 2 NMe 2,CH 2 OMe,CH2 SPh,C 6 H 11(OH),(CH 2)3 CN]。报告了一种合成产物的X射线结构。
Synthesis of vinyl sulfides using glycerol as a recyclable solvent
作者:Eder J. Lenardão、Márcio S. Silva、Renata G. Lara、Júnior M. Marczewski、Maraisa Sachini、Raquel G. Jacob、Diego Alves、Gelson Perin
DOI:10.3998/ark.5550190.0012.222
日期:——
alkynes promoted by KF/Al2O3, usingglycerol as recyclablesolvent. This improved method furnishes selectively the corresponding anti-Markovnikov vinylsulfides in good to excellent yields starting from terminal alkynes and aliphatic or aromatic thiols. The irradiation with microwaves facilitated the procedure and accelerates the reaction. The catalytic system and the glycerol can be re-used up to four
Reactions of phenylthiotrimethylsilylmethyllithium: Preparation of α-phenylthioketones and additions to 2-cyclohexen-1-one
作者:David J Ager
DOI:10.1016/s0040-4039(01)90557-x
日期:1981.1
Phenylthiotrimethylsilylmethyllithium(1) was reacted with a variety of electrophiles, including somecontaining two functional groups. α-Phenylthiolketones were obtained from the reaction with esters. The anion(1) underwent either 1,2- or 1,4-addition, depending on the conditions used, with 2-cyclohexen-1-one.