Heterocyclic Photorearrangements. Photoinduced Rearrangement of 3-Styryl-1,2,4-oxadiazoles
The photochemical behaviour of 3-styryl-5-phenyl-(5-methyl)-1,2,4-oxadiazoles in methanol at 254 nm has been investigated.A photoinduced rearrangement to the quinoline system has been pointed out and explained as proceeding through an initial photolysis of the ring O-N bond, followed by a six membered ring closure reaction involving the styryl moiety.