Alkylation of enol silyl ethers with vinylthionium ions generated from 1,1- and 1,3-bis(phenylthio)propenes.
作者:Roger Hunter、Joseph P. Michael、Daryl S. Walter
DOI:10.1016/s0040-4039(00)79108-8
日期:1992.9
Vinylthioniumions generated from 1,1- and 1,3-bis-(phenylthio) propenes alkylate enolsilylethers regioselectively under mild reaction conditions with tin tetrachloride.
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。
Effect of chalcogenyl substituent on the course of allyl rearrangement at chalcogenation of 1,3-dichloropropene
作者:E. P. Levanova、V. S. Nikonova、V. A. Grabel’nykh、N. V. Russavskaya、A. I. Albanov、I. B. Rozentsveig、N. A. Korchevin
DOI:10.1134/s1070428016050018
日期:2016.5
dichalcogenides in a redox system hydrazine hydrate–KOH is governed by the possibility of an allyl rearrangement. In the presence of bases this rearrangement proceeds via carbanion partially stabilized by the chalcogenyl substituent. The effectivity of the stabilization and consequently the probability of the rearrangement varies in the series of substituents PhS > BnS > PhSe. In the stage of the direct nucleophilic
Rhodium-catalyzed hydrothiolation of alkynes with thiols for construction of sulfur-containing π-conjugated systems
作者:Aya Yoshimura、Akihiro Nomoto、Akiya Ogawa
DOI:10.1007/s11164-014-1639-0
日期:2014.7
To synthesize sulfur-containing π-conjugated polymers, reaction conditions for rhodium-catalyzed hydrothiolation of terminal alkynes with arenethiols are optimized in detail. Under the optimized conditions, rhodium-catalyzed hydrothiolation of terminal alkynes proceeds regio- and stereoselectively to afford the corresponding vinyl sulfides via an anti-Markovnikov and syn-addition process. Then, the rhodium-catalyzed hydrothiolation is applied to polymerization of 2,5-diethynylthiophene with benzene-1,4-dithiol, which successfully provides sulfur-containing π-conjugated polymers with excellent regio- and stereoselectivities.