γ-Oxygenation of α,β-unsaturated esters by vinylogous O-nitroso Mukaiyama aldol reaction.

A practical procedure has been developed for γ-oxygenation of α,β-unsaturated esters by a vinylogous O-nitroso Mukaiyama aldol reaction followed by a one-pot N-O bond heterolysis of the in situ generated γ-aminoxy-α,β-unsaturated esters.