Add time:08/07/2019         Source:sciencedirect.com

20-Epidasycarpidone (10) and its N-benzyl analogue 9 have been synthesized via a conjugate addition of 2-(1,3-dithian-2-yl)indole (6) and 3-ethyl-Δ3-piperidein-2-ones 7 and 8, respectively. The transformation of 20-epidasycarpidone to 20-epiuleine (11) has been carried out as described in the literature in order to corroborate the structural assignments.

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