When verbenone (I) in cyclohexane is irradiated with ultraviolet light it is converted into the isomeric ketone chrysanthenone (11). In ethanol, wet ether, or ethereal ammonia there are obtained, in addition, the esters (XI) and (XII; X= OEt), the acid (XII; X= OH), and the amide (XII; X= NH,) respectively. Astudy of the photochemistry of verbenone (I) was initiated in the expectation that rearrangements would occur owing to the presence of an c+-unsaturated ...
