We have developed a highlyselectiveone-pot method for the synthesis of (E)-vinyl sulfones and sulfoxides from thiols with terminal alkynes. The sulfones and sulfoxides could be obtained with excellent selectivity in good isolated yields. It is simple, efficient and environmentally benign, and metal-free. The mechanism for the formation of the (E)-vinyl sulfones was also proposed.
Visible-light-induced selective synthesis of sulfoxides from alkenes and thiols using air as the oxidant
作者:Huanhuan Cui、Wei Wei、Daoshan Yang、Yulong Zhang、Huijuan Zhao、Leilei Wang、Hua Wang
DOI:10.1039/c7gc01416c
日期:——
A highly selective synthesis of sulfoxides from alkenes and thiols was established by visible-light photoredox catalysis at room temperature. This metal-free transformation protocol, which uses inexpensive Rose Bengal as the photocatalyst and air as the green oxidant, opens a new door toward the facile and practical construction of sulfoxides.
Studies on Hydrozirconation of 1-Alkynyl Sulfoxides or Sulfones and the Application for the Synthesis of Stereodefined Vinyl Sulfoxides or Sulfones
作者:Xian Huang、Dehui Duan、Weixin Zheng
DOI:10.1021/jo0111154
日期:2003.3.1
Z-beta-sulfonyl alpha,beta-unsaturated ketones, and Z-beta-alkynyl vinyl sulfones. Although the reaction mechanisms are still not clear, the neighboringgroupparticipation of the sulfinyl or sulfonyl group may be playing an important role in this unique hydrozirconation reaction.
thiophenols/thiols as thiolating agents. Specifically, metal catalysts and external chemical oxidants are not needed in the reaction for the formation of β-formyloxy sulfides, and these sulfides can be further converted to (E)-vinyl sulfones via the Selectfluor-mediated oxidation–olefination. Notably, on the basis of this electrochemical oxidation strategy, β-hydroxy sulfide, β-formyloxy sulfoxide, β-formyloxy
我们报告了使用市售苯硫酚/硫醇作为硫醇化剂的 PhB(OH) 2促进的苯乙烯电化学硫化-甲酰氧基化反应。具体而言,在形成 β-甲酰氧基硫化物的反应中不需要金属催化剂和外部化学氧化剂,这些硫化物可以通过 Selectfluor 介导的氧化-烯化进一步转化为 ( E )-乙烯基砜。值得注意的是,基于这种电化学氧化策略,β-羟基硫化物、β-甲酰氧基亚砜、β-甲酰氧基砜和(E)-乙烯基亚砜也可以很容易地制备。
(Diphenoxyphosphoryl)methyl <i>p</i>-tolyl sulfoxide: A new reagent for <i>Z</i>-selective synthesis of racemic and optically active vinyl sulfoxides
作者:Wanda H. Midura、Ashraf M. Mohamed Ewas、Marian Mikołajczyk
DOI:10.1080/10426507.2015.1114489
日期:2016.3.3
GRAPHICAL ABSTRACT ABSTRACT Racemic and opticallyactive (+)-(S)-(diphenoxyphosphoryl)methyl p-tolyl sulfoxide were prepared and used as Horner olefination reagents. Their reaction with aromatic and aliphatic aldehydes afforded the corresponding racemic and enantiomeric α,β-unsaturated sulfoxides with moderate to high Z-selectivity. The E/Z ratio was found to be dependent on the structure of aldehyde
图形摘要摘要制备了外消旋的和旋光的(+)-(S)-(二苯氧基磷酰基)甲基对甲苯基亚砜并用作Horner烯化试剂。它们与芳香族和脂肪族醛反应得到相应的外消旋和对映异构 α,β-不饱和亚砜,具有中等至高的 Z 选择性。发现 E/Z 比取决于醛的结构、碱的性质、反应条件和 18-crown-6 的添加。