SCHEDULED MAINTENANCE
Under acidic conditions dihydromancunine (2) can be obtained directly from 3β-dihydrovincoside (1c) by cyclisation of N-4 to C-21, whereas 3α-strictosidine (1a) affords a novel N-1 cyclised derivative, nacycline (6).
R. T. Brown, C. L. Chapple and A. G. Lashford, J. Chem. Soc., Chem. Commun., 1975, 295 DOI: 10.1039/C39750000295
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