Copper catalyzed cross-coupling reactions of carboxylic acids: an expedient route to amides, 5-substituted γ-lactams and α-acyloxy esters

A convenient and recyclable catalytic protocol for the synthesis of N, N-dimethyl substituted amides, 5-substituted gamma-lactams and alpha-acyloxy ethers from carboxylic acids using CuO nanoparticles and TBHP is described.