Photochemical transformations of small ring heterocyclic compounds. 88. Photochemical rearrangements of 4, 7-dimethyl-3-chromanone and related compounds
A Padwa, W Owens
文献索引：Padwa,A.; Owens,W. Journal of Organic Chemistry, 1977 , vol. 42, # 18 p. 3076 - 3082
10 11 benzo-heterocyclic olefins. a15 Simple addition of methanol to o-quinoneallide 17 best rationalizes the formation of 9. Our present results are especially interesting in view of the fact that the irradiation of 8 does not afford any detectable quantities of a 4-substituted dihydrocoumarin (ie, 5, R= CH3). As was pointed out in a previous report? these hydroxyl
