2-(Trimethylsilyl)ethyl Sulfoxides as a Convenient Source of Sulfenate Anions
作者:Stéphane Perrio、Florian Foucoin、Caroline Caupène、Jean-François Lohier、Jana Sopkova de Oliveira Santos、Patrick Metzner
DOI:10.1055/s-2007-966017
日期:2007.5
The present report describes the novel and smooth generation of sulfenate salts by fluoride-mediated cleavage of 2-(trimethylsilyl)ethyl sulfoxides. Efficiency of the process was elucidated through further reaction with alkyl halides to give stable sulfoxide end products.
Nondirected Copper-Catalyzed Sulfoxidations of Benzylic C–H Bonds
作者:Hao Yu、Zhen Li、Carsten Bolm
DOI:10.1021/acs.orglett.8b00615
日期:2018.4.6
A copper-catalyzed sulfoxidation of benzylic C–H bonds by nondirected oxidative C(sp3)-H activation was developed. The process proceeds via sulfenate anions, which are generated by base-triggered elimination of β-sulfinyl esters and benzyl radicals. The functional group tolerance is high, and the product yields are good.
reported here the low loading porphyrin-inspired high-valent manganese (IV)-oxo complex was applied in oxidative kineticresolution (OKR) of racemic heterocyclic sulfoxides using the environmentally benign hydrogen peroxide for the first time. This approach allows for rapid OKR (0.5 h) of a variety of racemic sulfoxides (including pyridine, pyrimidine, pyrazine, thiazole, benzothiazole, thiophene) in
[EN] ION PAIR CATALYSIS OF TUNGSTATE AND MOLYBDATE<br/>[FR] CATALYSE PAR PAIRE D'IONS DE TUNGSTATE ET DE MOLYBDATE
申请人:UNIV NANYANG TECH
公开号:WO2017164813A1
公开(公告)日:2017-09-28
D The present invention relates to ion pair catalysts (I) comprising the cationic bisguanidinium ligand (A) and diperoxomolybdate anion (B). The present invention also relates to ion pair catalysts (III) comprising the cationic bisguanidinium ligand (C) and peroxotungstate anion (D). It further relates to the use of the said catalysts in the manufacture of enantiomerically enriched sulfoxides.
Sensitive nature of ligand coupling and pseudorotation to electronic effect of substituent---ligand coupling in the reactions of benzylic aryl sulfoxides with benzylic Grignard reagents
Unlike the reaction of benzylic 2-pyridyl sulfoxides with benzylic Grignardreagents, in the reaction of p-benzenesulfonylphenyl benzylic sulfoxides with benzylic Grignardreagents, benzylic groups bearing an electron-withdrawing group tends to couple with the aryl group preferentially. This change is considered to be due to a slight change of electronic environements which would effect on the ease