MAJOR CAROTENOIDS OF SHEPHERDIA CANADENSIS . ISOLATION AND SYNTHESIS OF METHYL APO-6'-LYCOPENOATE

Lycopene (III) and methyl apo-6′-lycopenoate (IV) are the major carotenoids of ripe berries of Shepherdia canadensis. The structural assignment of the new apo-carotenoid (IV) followed from its spectroscopic properties including NMR and mass spectra as well as the chemical and physical properties of various derivatives (V-IX), and was confirmed by synthesis via apo-8′-lycopenal (XII) and carbomethoxymethylenetriphenyl phosphorane (XIV). © 1969.