Catalytic enantioselective [2+4] and [2+2] cycloaddition reactions with propiolamides

We report here the catalytic and highly enantioselective [2 + 4] and [2 + 2] cycloaddition reactions of electron-rich dienes or silyl enol ethers with electron-deficient propiolamide derivatives induced by copper(II)center dot 3-(2-naphthyl)-L-alanine amide complex.