Metal-free oxidative coupling of alkyl chlorides with thiols: An efficient access to sulfoxides
作者:Qian Liu、Xiaoqian Zhao、Feng Xu、Gaoqiang Li
DOI:10.1016/j.tetlet.2019.151492
日期:2020.2
An efficient and step-economical access to sulfoxides from thiols and alkyl halides in the presence of I2O5 and DBU via direct oxidative couplings is described here. It is the first case that combined Williamson sulfide synthesis and subsequent sulfide oxidation into one step manipulation for sulfoxides preparation. This protocol features wide substrate scope, mild and metal-free conditons, the use
本文描述了在I 2 O 5和DBU存在下,通过直接氧化偶合从硫醇和烷基卤化物高效,经济地获取亚砜的方法。这是第一种将威廉姆森硫化物合成和随后的硫化物氧化结合起来一步一步进行亚砜制备的情况。该协议具有广泛的底物范围,温和无金属的条件,使用天然丰富的起始原料以及避免过度氧化的特点。
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.
Transfer of Electrophilic NH Using Convenient Sources of Ammonia: Direct Synthesis of NH Sulfoximines from Sulfoxides
作者:Marina Zenzola、Robert Doran、Leonardo Degennaro、Renzo Luisi、James A. Bull
DOI:10.1002/anie.201602320
日期:2016.6.13
valuable motifs for drug discovery. The protocol employs readily available sources of nitrogen without the requirement for either preactivation or for metal catalysts. Mixing ammonium salts with diacetoxyiodobenzene directly converts sulfoxides into sulfoximines. This report describes the first example of using of ammonia sources with diacetoxyiodobenzene to generate an electrophilic nitrogen center.
Herein we reported an efficient palladium-catalyzed enantioselective arylation of both alkyl and aryl sulfenate anions to deliver various chiral sulfoxides in good yields (up to 98%) with excellent enantioselectivities (up to 99% ee) by the use of our developed chiral O,P-ligands (PC-Phos). PC-Phos are easily prepared in shortsteps from inexpensive commercially available starting materials. The single-crystal
Photochemistry of benzyl β-naphthyl sulfoxide and characterization of the β-naphthylsulfinyl radical
作者:Yushen Guo、Alexandre P. Darmanyan、William S. Jenks
DOI:10.1016/s0040-4039(97)10314-8
日期:1997.12
Photolysis of benzyl β-naphthyl sulfoxide results mainly in α-cleavage. The isomeric sulfenic ester is the major product. Because the triplet energies of both the sulfoxide and sulfenic ester are below that of acetone, in contrast to the previously studied phenyl and tolyl cases, interpretation of sensitization experiments is straightforward. The sulfinyl radical is characterized by transient absorption