Toward the ABCD Core of the Calyciphylline A-Type Daphniphyllum Alkaloids: Solvent non-Innocence in Neutral Aminyl Radical Cyclizations.
Toward the ABCD Core of the Calyciphylline A-Type Daphniphyllum Alkaloids: Solvent non-Innocence in Neutral Aminyl Radical Cyclizations.
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DOI:
10.1016/j.tetlet.2015.01.121
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发表时间:
2015-06-03
影响因子:
1.8
通讯作者:
Ibrahim AA
中科院分区:
文献类型:
--
作者:
Stockdill JL;Lopez AM;Ibrahim AA
The Daphniphyllum alkaloids remain an attractive target in the synthetic community because of their unique framework and promising biological activities. We have shown that the ABC core of the calyciphylline A-type alkaloids can be rapidly accessed via the tandem cyclization of a neutral aminyl radical with a polarized cyclic olefin. Deuterium labeling experiments and reactions omitting a tin hydride reagent suggest that the solvent is the major source of the terminating hydrogen atom in the cyclization cascade. Incorporation of an internal alkyne in the radical pathway was tolerated in the reaction, and it provided the necessary atoms to enable completion of the D ring of the calyciphylline A-type alkaloids.
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DOI:
10.1016/s0168-1176(96)04383-2
发表时间:
1996-11-22
期刊:
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY AND ION PROCESSES
影响因子:
--
作者:
Ellison, GB;Davico, GE;DePuy, CH
通讯作者:
DePuy, CH
影响因子:
15
作者:
MHALLA, F;PINSON, J;SAVEANT, JM
通讯作者:
SAVEANT, JM
影响因子:
3.6
作者:
Crich, D;Hwang, JT
通讯作者:
Hwang, JT
影响因子:
2.8
作者:
Kotha, Sambasivarao;Ravikumar, Ongolu
通讯作者:
Ravikumar, Ongolu
影响因子:
2.1
作者:
CURRAN, DP;YU, HS;LIU, HT
通讯作者:
LIU, HT