SCHEDULED MAINTENANCE
A general synthetic route to the benzo[f]quinolines (21)–(27), the despyrrole analogues of lysergic and isolysergic esters and isofumigaclavine A, is described. The route involves the reductive photo-cyclisation of the enamide (2) followed by glycol formation and oxidative ring opening of the dihydrofuran ring.
I. Ninomiya, C. Hashimoto, T. Kiguchi and T. Naito, J. Chem. Soc., Perkin Trans. 1, 1984, 2911 DOI: 10.1039/P19840002911
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