Asymmetric [4 + 3] cycloadditions between vinylcarbenoids and dienes: application to the total synthesis of the natural product (-)-5-epi-vibsanin E.
Asymmetric [4 + 3] cycloadditions between vinylcarbenoids and dienes: application to the total synthesis of the natural product (-)-5-epi-vibsanin E.
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DOI:
10.1021/ja9019484
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发表时间:
2009-06-17
影响因子:
15
通讯作者:
Williams CM
中科院分区:
文献类型:
--
作者:
Schwartz BD;Denton JR;Lian Y;Davies HM;Williams CM
The total synthesis of (−)-5-epi-vibsanin E (2) has been achieved in 18 steps. The synthesis combines the rhodium-catalyzed [4 + 3] cycloaddition between a vinylcarbenoid and a diene to rapidly generate the tricyclic core with an effective end game strategy to introduce the remaining side-chains. The [4 + 3] cycloaddition occurs by a cyclopropanation to form a divinylcyclopropane followed by a Cope rearrangement to form a cycloheptadiene. The quaternary stereogenic center generated in the process can be obtained with high asymmetric induction when the reaction is catalyzed by the chiral dirhodium complex, Rh2(S-PTAD)4.
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影响因子:
2.7
作者:
Schwartz BD;Williams CM;Bernhardt PV
通讯作者:
Bernhardt PV
影响因子:
5.2
作者:
Brummond, KM;Gao, D
通讯作者:
Gao, D
影响因子:
15
作者:
Davies, HML;Stafford, DG;Houser, JH
通讯作者:
Houser, JH
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15
作者:
Nowlan, DT;Gregg, TM;Singleton, DA
通讯作者:
Singleton, DA
影响因子:
5.2
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通讯作者:
Ricard, L