Reduction of Sulfonic Acids with Triphenylphosphine–Diaryl Disulfide System
作者:Shigeru Oae、Hideo Togo
DOI:10.1246/bcsj.57.232
日期:1984.1
Diaryl disulfides are effective catalysts to reduce arenesulfonic acids with triphenylphosphine to the corresponding arenethiols in good yields, while alkanesulfonic acids are transferred into the corresponding alkyl aryl sulfides. Arenesulfonic acids bearing electron-donating substituents can be reduced more readily than those having electron-withdrawing substituents, while diaryl disulfides bearing electron-withdrawing substituents are more effective catalysts than diaryl disulfides with electron-donating ring substituents.
Direct Decarboxylative Functionalization of Carboxylic Acids via O–H Hydrogen Atom Transfer
作者:Christina G. Na、Davide Ravelli、Erik J. Alexanian
DOI:10.1021/jacs.9b10825
日期:2020.1.8
Decarboxylative functionalization via hydrogen atom transfer offers an attractive alternative to standard redox approaches to this important class of transformations. Herein, we report a direct decarboxylative functionalization of aliphatic carboxylicacidsusing N-xanthylamides. The unique reactivity of amidylradicals in hydrogen atom transfer enables decarboxylative xanthylation under redox-neutral