Enantioselective syntheses of alpha-methylene butyrolactones via asymmetric aminocarbonylation of tungsten-prop-2-ynyl compounds

摘要

[[abstract]]A tungsten-eta(1)-vinylprop-2-ynyl compound undergoes enantioselective aminocarbonylation to afford an optically pure tungsten-pi-gamma-lactone; this pi-allyl complex is useful for the efficient synthesis of optically pure alpha-methylene butyrolactone.