ENANTIOMER DIFFERENTIATION IN THE PHOTOINDUCED 1,5-PHENYL SHIFT OF 3-METHYL-3-PHENYL-2(3H)-OXEPINONE UTILIZING CHIRAL SENSITIZERS

Enantiomer differentiation has been observed in the initial 1,5-phenyl shift of the sensitized photorearrangement of racemic 3-methyl-3-phenyl-2(3H)-oxepinone with chiral N-(1-phenylethyl)naphthalenecarboxamides leading to optically active 4-methyl-7-exo-phenyl-2-oxabicyclo[4.1.0]hept-4-en-3-one.