Biomimetic Total Syntheses of (-)-Leucoridines A and C through the Dimerization of (-)-Dihydrovalparicine.

Biomimetic Total Syntheses of (-)-Leucoridines A and C through the Dimerization of (-)-Dihydrovalparicine.
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DOI:
10.1002/anie.201505198
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发表时间:
2015-10-19
影响因子:
16.6
通讯作者:
Andrade, Rodrigo B.
Andrade, Rodrigo B.
中科院分区:
化学1区
文献类型:
--
作者:
Kokkonda, Praveen;Brown, Keaon R.;Seguin, Trevor J.;Wheeler, Steven E.;Vaddypally, Shivaiah;Zdilla, Michael J.;Andrade, Rodrigo B.

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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.
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期刊: ORGANIC LETTERS
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