| Literature DB >> 26315453 |
Praveen Kokkonda1, Keaon R Brown1, Trevor J Seguin2, Steven E Wheeler2, Shivaiah Vaddypally1, Michael J Zdilla1, Rodrigo B Andrade3.
Abstract
Concise biomimetic syntheses of the Strychnos-Strychnos-type bis-indole alkaloids (-)-leucoridine A (1) and C (2) were accomplished through the biomimetic dimerization of (-)-dihydrovalparicine (3). En route to 3, the known alkaloids (+)-geissoschizoline (8) and (-)-dehydrogeissoschizoline (10) were also prepared. DFT calculations were employed to elucidate the mechanism, which favors a stepwise aza-Michael/spirocyclization sequence over the alternate hetero-Diels-Alder cycloaddition reaction.Entities:
Keywords: biomimetic synthesis; indole alkaloids; natural products; reaction mechanisms; total synthesis
Mesh:
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Year: 2015 PMID: 26315453 PMCID: PMC5012216 DOI: 10.1002/anie.201505198
Source DB: PubMed Journal: Angew Chem Int Ed Engl ISSN: 1433-7851 Impact factor: 15.336