A simple and efficient method for the direct oxidative coupling of amides with benzylic and allylic sp(3) C-H bonds using DDQ as an oxidant is described. A range of amides including benzamide, benzyl carbamate, and substituted sulfonamides reacted efficiently with various benzylic and allylic substrates under metal free conditions to afford amidation products in good to excellent yields. (C) 2012 Elsevier Ltd. All rights reserved.
Gold-Catalyzed, SN1-Type Reaction of Alcohols to Afford Ethers and Cbz-Protected Amines
intermolecular, SN1-type reaction to directly form unsymmetrical ethers and N-benzyloxy carbamate- (Cbz) protected amines is reported. Results have shown this reaction to be highly reproducible and tolerant of moisture, and moderate to high product yields (53–99%) were obtained. Significantly, the intermolecular catalytic amination of alcohols to directly afford Cbz-protected amines is heretofore unprecedented