Unsymmetrical Disulfides Synthesis via Sulfenium Ion
作者:Amarchand Parida、Khokan Choudhuri、Prasenjit Mal
DOI:10.1002/asia.201900620
日期:2019.8
An umpolung approach for the synthesis of unsymmetrical disulfides via sulfenium ion is reported. In situ generated electrophilic sulfenium ion from electron‐rich thiols reacted with second thiols to yield unsymmetrical disulfides. Using an iodine catalyst and 4‐dimethylaminopyridine (DMAP)/water as promoter, the target syntheses were achieved in one pot under aerobic condition.
Palladium Catalyzed Aryl(alkyl)thiolation of Unactivated Arenes
作者:Perumal Saravanan、Pazhamalai Anbarasan
DOI:10.1021/ol4036209
日期:2014.2.7
palladium-catalyzed aryl(alkyl)thiolation of various substituted unactivated arenes is accomplished for the synthesis of diverse unsymmetrical diaryl(alkyl) sulfides in good yield employing electrophilic sulfur reagent 6 derivedfrom succinimide. The developed strategy was coupled with intramolecular arylation of a C–H bond to afford dibenzothiphene derivatives, an important moiety in material science as organic
Iodine(III) Enabled Dehydrogenative Aryl C−S Coupling by in situ Generated Sulfenium Ion
作者:Khokan Choudhuri、Saikat Maiti、Prasenjit Mal
DOI:10.1002/adsc.201801510
日期:2019.3.5
Due to the normal polarity preferences, arenes form stable complexes with thiols through S−H⋅⋅⋅π interaction and direct dehydrogenative aryl C−S coupling is usually restricted. We report here an umpolung based one pot and direct C−S coupling approach under metal free and mild condition. Electrophile sulfenium ions were generated in situ from thiols using iodine(III) reagent PhI(OAc)2 (PIDA) and subsequently
A simple, efficient, and practical metal-free C-H sulfenylation of substituted electron-rich arenes has been developed. This method is highly regioselective, and the corresponding aryl sulfides were obtained in moderate to excellent yields from stable and readily accessible N-(alkylthio)- and N-(arylthio)succinimides at room temperature in the presence of TFA.