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。
Regio- and Stereoselective Copper-Catalyzed Addition of Aromatic and Aliphatic Thiols to Terminal and Internal Nonactivated Alkynes
作者:Irina Beletskaya、Inna Trostyanskaya
DOI:10.1055/s-0031-1290345
日期:2012.3
The CuI-catalyzed regio- and stereoselective hydrothiolation of terminal and internal alkynes affords (Z)-β-alkenylsulfides. The following isomerization of the Z-isomers into E-isomers catalyzed by CuI is described. hydrothiolation - alkynes - copper catalyst -stereoselective anti-Markovnikov addition -isomerization