Nine-step enantioselective total synthesis of (-)-vincorine.
Nine-step enantioselective total synthesis of (-)-vincorine.
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DOI:
10.1021/ja402933s
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发表时间:
2013-05-01
影响因子:
15
通讯作者:
MacMillan, David W. C.
中科院分区:
文献类型:
--
作者:
Horning, Benjamin D.;MacMillan, David W. C.
A concise and highly enantioselective total synthesis of the akuammiline alkaloid (−)-vincorine has been accomplished. A key element of the synthesis is a stereoselective organocatalytic Diels–Alder, iminium cyclization cascade sequence, which serves to construct the tetracyclic alkaloid core architecture in one step from simple achiral precursors. The challenging seven-membered, azepanyl ring system is installed by way of a single electron-mediated cyclization event initiated from an acyl telluride precursor. The total synthesis of (−)-vincorine is achieved in nine steps and 9% overall yield from commercially available starting materials.
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