A unified route to the welwitindolinone alkaloids: total syntheses of (-)-N-methylwelwitindolinone C isothiocyanate, (-)-N-methylwelwitindolinone C isonitrile, and (-)-3-hydroxy-N-methylwelwitindolinone C isothiocyanate.
A unified route to the welwitindolinone alkaloids: total syntheses of (-)-N-methylwelwitindolinone C isothiocyanate, (-)-N-methylwelwitindolinone C isonitrile, and (-)-3-hydroxy-N-methylwelwitindolinone C isothiocyanate.
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DOI:
10.1021/ja210793x
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发表时间:
2012-01-25
影响因子:
15
通讯作者:
Rawal, Viresh H.
中科院分区:
文献类型:
--
作者:
Allan, Kevin M.;Kobayashi, Kenichi;Rawal, Viresh H.
As part of a comprehensive strategy to the welwitindolinone alkaloids possessing a bicyclo[4.3.1]decane core, we report herein concise asymmetric total syntheses of (−)-N-methylwelwitindolinone C isothiocyanate (2a), (−)-N-methylwelwitindolinone C isonitrile (2b), and (−)-3-hydroxy-N-methylwelwitindolinone C isothiocyanate (3a) from a common tetracyclic intermediate. The crucial vinyl chloride moiety was installed through electrophilic chlorination of a hydrazone, but only after adjustment of reactivity to circumvent a facile skeletal rearrangement. Selective desulfurization and oxidation of 2a provided access to 2b and 3a, respectively. Notably, this work provides corrected 1H and 13C NMR spectral data for 3a.
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影响因子:
5.2
作者:
Brailsford JA;Lauchli R;Shea KJ
通讯作者:
Shea KJ
DOI:
10.1039/c39720000443
发表时间:
1972-01-01
影响因子:
--
作者:
ISAACS, NS;KIRKPATRICK, D
通讯作者:
KIRKPATRICK, D
影响因子:
4.9
作者:
Boissel, Valerie;Simpkins, Nigel S.;Lewis, William
通讯作者:
Lewis, William
影响因子:
5.2
作者:
Heidebrecht, Richard W., Jr.;Gulledge, Brian;Martin, Stephen F.
通讯作者:
Martin, Stephen F.
影响因子:
1.8
作者:
BURTON, G;ELDER, JS;STACHULSKI, AV
通讯作者:
STACHULSKI, AV