Irradiation of the N-(o-iodophenylethyl)methyl-enepyrrolones (1a, b) provides the dihydro-pyrrolo-[2,1-b][3]benzazepines (2a, b), one of which (2a) is converted into the Cephalotaxus alkaloid synthon (5).
I. Tse and V. Snieckus, J. Chem. Soc., Chem. Commun., 1976, 505 DOI: 10.1039/C39760000505
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