HBr/H 2 O 2 -mediated formation of C–S bond with thiosulfates
作者:Rongxing Zhang、Shengzhou Jin、Yuanxing Wan、Sen Lin、Zhaohua Yan
DOI:10.1016/j.tetlet.2018.01.055
日期:2018.2
environmentally-friendly H2O2 as oxidant and HBr as catalyst. Based on the preliminary experimental results, a plausible reaction mechanism was proposed for HBr/H2O2-mediated formation of C–S bond with thiosulfates.
通过HBr / H 2 O 2介导的苯乙烯和4-羟基香豆素的亚磺酰基化反应导致不对称硫化物的形成,一种新颖,有效且绿色的构建C–S键的方案得以开发。使用环境友好的H 2 O 2作为氧化剂和HBr作为催化剂,一步一步制备各种不对称硫化物,并具有中等至良好的收率。根据初步的实验结果,提出了一种可能的反应机理,该反应机理是HBr / H 2 O 2介导的与硫代硫酸盐形成CS键的反应。
Molecular Iodine Catalyzed Hydroxysulfenylation of Alkenes with Disulfides in Aerobic Conditions
molecular-iodine-catalyzed radical reaction. This reaction involves hydroxysulfenylation of alkenes with disulfides in aqueous solution. Air is used as the oxidant without any additives. Control experiments indicated that the oxygen atom of products might come from O2. Both aryl alkenes and aliphatic alkenes were well tolerated in this transformation and afforded the corresponding products in moderate