S. Tanaka et al., NOVEL PHOTO-REARRANGEMENT OF OXIME METHYL ETHERS OF L-1,2-DIHYDROCINNOLINE-N-PHENYL-1,2-DICARBOXIMIDES, Chemistry Letters, (4), 1994, pp. 771-774
Irradiation of conjugated imino ethers containing an adjacent 1,2-diaz
adicarboximide group in benzene afforded rearranged indole derivatives
(3) and a novel dimer in good yields. The latter was formed by nucleo
philic attack of 3 to a dipolar intermediate.