Photocyclisation of some N-naphthylacrylamides (1)–(6) provided a general synthetic route to benzo [H]-and benzo[f]-quinolines (7)–(12) and two compounds containing the basic indolo[4,3-fg] quinoline nucleus of ergot alkaloids, (17) and (21), were readily prepared.
I. Ninomiya, C. Hashimoto, T. Kiguchi and T. Naito, J. Chem. Soc., Perkin Trans. 1, 1983, 2967 DOI: 10.1039/P19830002967
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