Total synthesis of the spirocyclic imine marine toxin (-)-gymnodimine and an unnatural C4-epimer.
Total synthesis of the spirocyclic imine marine toxin (-)-gymnodimine and an unnatural C4-epimer.
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DOI:
10.1021/ja207385y
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发表时间:
2011-12-14
影响因子:
15
通讯作者:
Romo, Daniel
中科院分区:
文献类型:
--
作者:
Kong, Ke;Moussa, Ziad;Lee, Changsuk;Romo, Daniel
The first total synthesis of the marine toxin (−)-gymnodimine (1) has been accomplished in a convergent manner. A highly diastereo- and enantioselective exo-Diels–Alder reaction catalyzed by a bis-oxazoline Cu(II) catalyst enabled rapid assembly of the spirocyclic core of gymnodimine. The preparation of the tetrahydrofuran fragment utilized a chiral auxiliary based anti-aldol reaction. Two major fragments, spirolactam 56 and tetrahydrofuran 55, were then coupled through an efficient Nozaki–Hiyama–Kishi reaction. An unconventional, ambient temperature t-BuLi-initiated intramolecular Barbier reaction of alkyl iodide 64 was employed to form the macrocycle. A late stage vinylogous Mukaiyama aldol addition of a silyloxyfuran to a complex cyclohexanone 83 appended the butenolide and a few additional steps provided (−)-gymnodimine (1). A diastereomer of the natural product was also synthesized, C4-epi-gymnodimine (90), derived from the vinylogous Mukaiyama aldol addition.
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影响因子:
15
作者:
Araoz, Romulo;Servent, Denis;Molgo, Jordi;Iorga, Bogdan I.;Fruchart-Gaillard, Carole;Benoit, Evelyne;Gu, Zhenhua;Stivala, Craig;Zakarian, Armen
通讯作者:
Zakarian, Armen
影响因子:
1.8
作者:
Betzer, JF;Ardisson, J;Pancrazi, A
通讯作者:
Pancrazi, A
影响因子:
3
作者:
ANDERSON, DM
通讯作者:
ANDERSON, DM
影响因子:
15
作者:
BROWN, HC;GUPTA, SK
通讯作者:
GUPTA, SK
影响因子:
3.6
作者:
ARJONA, O;DOMINGUEZ, C;PLUMET, J
通讯作者:
PLUMET, J