Efficient and Highly Selective Oxidation of Sulfides to Sulfoxides in the Presence of an Ionic Liquid Containing Hypervalent Iodine
作者:Weixing Qian、Lin Pei
DOI:10.1055/s-2006-933109
日期:——
A mild, efficient, highlyselective, and environmentally friendly oxidation of sulfides to sulfoxides with a recyclable ion-supportedhypervalentiodinereagent has been developed. This reaction is tolerant of hydroxyl, nitrile, methoxy, carbon-carbon double bonds, and ester functionalities. Aliphatic and aromatic sulfides are selectively oxidized to the corresponding sulfoxides at room temperature
Hyperaromatic Stabilization of Arenium Ions: Acid-Catalyzed Dehydration of 2-Substituted 1,2-Dihydro-1-naphthols
作者:Jaya Satyanarayana Kudavalli、Dara Coyne、Rory A. More O’Ferrall
DOI:10.1021/jo2020483
日期:2012.1.6
correlation is taken to indicate that cis substuents are reacting normally, differentiated only by their inductive effects. The slower reactions of the trans isomers are the judged to be “abnormal”. This is confirmed by comparing effects of cis and trans β-OH substituents on the reactivities of dihydro phenols, naphthols, and phenanthrols. Whereas kH/kOH for cis substituents varies by less than 8-fold
Symmetric Diarylsulfoxides as Asymmetric Sulfinylating Reagents for Dialkylmagnesium Compounds
作者:Simon Ruppenthal、Reinhard Brückner
DOI:10.1021/jo502417j
日期:2015.1.16
dilithium salt of (S)-BINOL was added as a promotor. Alkyl aryl sulfoxides resulted in up to quantitative yield and with up to 97% ee. This demonstrates the feasibility of asymmetric sulfinylations by achiral sulfinylating agents (from the perspective of Alkyl2Mg) as well as the feasibility of asymmetricsulfoxide–magnesiumexchanges (from the perspective of Ar2SO).
Activation of Superoxide. Facile Oxidation of Sulfoxides into Sulfones with a Peroxysulfur Intermediate Generated in situ from 2-Nitrobenzenesulfonyl Chloride and Superoxide
作者:Yong Hae Kim、Hyeon Kyu Lee
DOI:10.1246/cl.1987.1499
日期:1987.8.5
alkyl-aryl, and diaryl sulfoxides, were readily oxidized into the corresponding sulfones, in excellent yields under mild conditions, by 2-nitrobenzene peroxysulfurintermediate yenerated in situ from 2-nitrobenzenesulfonyl chloride and potassium superoxide at −30 °C, in dry acetonitrile. Chemoselective oxidation of sulfoxides which contain both double bond and sulfinyl moiety to the sulfones, was observed