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Updated: May 29, 2026

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A Customizable Approach for the Enzymatic Production and Purification of Diterpenoid Natural Products
Published on: October 4, 2019
Total synthesis of (±)-dragmacidin E
Ken S Feldman1, Paiboon Ngernmeesri
1Chemistry Department, The Pennsylvania State University, University Park, Pennsylvania 16802, USA. ksf@chem.psu.edu
Organic Letters
|October 1, 2011
Abstract:
The bis indole sponge alkaloid dragmacidin E was synthesized in racemic form over 25 steps starting from 7-benzhydroxyindole. Key steps include (a) a Witkop cyclization to facilitate construction of the indole-spanning seven-membered ring and (b) a cyclodehydrative pyrazinone synthesis that unites the two indole-containing sectors.

