Alternative cyclisation of 3α- and 3β- indole alkaloid glucosides

J. Chem. Soc., Chem. Commun.
2004.0

Abstract

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).

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