The air-stable carbocation salt [(MeOC<sub>6</sub>H<sub>4</sub>)CPh<sub>2</sub>][BF<sub>4</sub>] in Lewis acid catalyzed hydrothiolation of alkenes
作者:Eliar Mosaferi、David Ripsman、Douglas W. Stephan
DOI:10.1039/c6cc03970g
日期:——
Markovnikov hydrothiolation of 1,1-disubstituted and trisubstituted olefins (20 examples) is catalyzed by Lewisacids, including the air-stable trityl-cation salt [(MeOC6H4)CPh2][BF4] 3.
1,1-二取代和三取代的烯烃的马尔科夫尼科夫氢硫醇化反应(20个实例)由路易斯酸催化,包括空气稳定的三苯甲基阳离子盐[(MeOC 6 H 4)CPh 2 ] [BF 4 ] 3。
作者:Bing Xu、Ying Lin、Yang Ye、Li Xu、Tian Xie、Xiang-Yang Ye
DOI:10.1039/d1ra08015f
日期:——
conditions, a variety of thioethers are efficiently prepared from readily available benzyl alcohols (primary, secondary, and tertiary) and thiols in the presence of Cu(OTf)2 as the Lewis acid catalysis. This C–S bond formation protocol furnishes exceptional chemoselectivity, and the preliminary mechanism studies show that the reaction should proceed through a Lewis-acid-mediated SN1-type nucleophilic attack
一种新型的铜催化硫醚化反应已被开发出来,可以以中等至优异的产率提供苄基硫醚。在温和且易于操作的条件下,在Cu(OTf) 2作为Lewis酸催化下,由容易获得的苯甲醇(伯醇、仲醇和叔醇)和硫醇有效地制备了多种硫醚。这种C-S键形成方案提供了优异的化学选择性,初步机制研究表明该反应应通过路易斯酸介导的S N 1型对原位形成的碳阳离子的亲核攻击进行。
Application of Halogen-Bonding Catalysis for Markovnikov-Type Hydrothiolation of Alkenes
作者:Zhankui Sun、Xue Zhang、Nuoyu Liang、Ruining Li
DOI:10.1055/a-1984-9105
日期:2023.3
Carbon–sulfur bond-formation reactions are applied widely in organic synthesis and chemical biology. Hydrothiolation of alkenes provides a direct way to build carbon–sulfur bonds. Most known methods proceed via radical processes and result in anti-Markovnikov-type products. Herein, we demonstrate that I2 catalyzes the hydrothiolation of alkenes and provides Markovnikov-type products in good to excellent
碳硫键形成反应在有机合成和化学生物学中有着广泛的应用。烯烃的氢硫醇化提供了建立碳硫键的直接方法。大多数已知方法通过激进过程进行并产生反马尔可夫尼科夫型产品。在此,我们证明 I 2催化烯烃的氢硫醇化反应,并以良好至优异的收率提供 Markovnikov 型产品。滴定研究表明硫醇被 I 2通过卤键激活。这种无金属反应具有绿色温和、功能耐受性高、底物适用范围广、原子经济等优点。它的应用在肽合成中得到进一步证明。
Srinivas, S.; Srinivas, P.; Gurudutt, K. N., Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1998, vol. 37, # 11, p. 1174 - 1176
作者:Srinivas, S.、Srinivas, P.、Gurudutt, K. N.
DOI:——
日期:——
Die NMR-daten der methylenprotonen der benzylmercaptogruppen einiger monobenzylmercapto- und gem-dibenzylmercaptoverbindungen