Summary The title compound 1 undergoes on n, n*-excitation vinylogous 8-cleavage of the C (y), 0-bondandisomerizes to theunsaturated l, Sdiketone8 (58%) and the tricyclic diketone9 (14%). Onn, x*-excitation, however, 1 undergoes only desoxygenation to the dienone 7 (ca. 15%) besides polymerization. UV.-irradiation of 1 (A2347 nm) in the presence of tributyl-stannane gives 7 in 85% yield; in the presence of tributylstannane-d, 1 ...
![1a,3,3a,4,5,7b-Hexahydro-1a-isopropyl-3a-methylnaphth[1,2-b]oxiren-6(2H)-one结构式](https://image.chemsrc.com/caspic/347/66708-14-3.png)