A short and efficient synthesis of 2,3,4,5-tetrahydro-1H-1,5-methano-2-benzazepines (B-norbenzomorphans) carrying hydroxy, alkoxy, and acyloxy groups at the C-5 position, based on the acid-catalysed cyclization of 2-aryl-1-formyl-4-piperidones, is described.
J. Bosch, M. Rubiralta, M. Moral and J. Bolós, J. Chem. Soc., Perkin Trans. 1, 1984, 1459 DOI: 10.1039/P19840001459
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