Synthesis of Z-α,β-ethylenic N-boc-γ-amino esters from nitrones
The reduction of γ-N-hydroxylamino-α,β-acetylenic esters bearing a methoxy-substituted benzyl group on the nitrogen atom by zinc in a MeOH/AcOH mixture leads stereoselectively to Z-γ-amino-α,β-ethylenic esters.