Enantioselective polyene cyclization via organo-SOMO catalysis.
Enantioselective polyene cyclization via organo-SOMO catalysis.
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DOI:
10.1021/ja100185p
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发表时间:
2010-04-14
影响因子:
15
通讯作者:
MacMillan, David W. C.
中科院分区:
文献类型:
--
作者:
Rendler, Sebastian;MacMillan, David W. C.
The first organocatalytic enantioselective radical polycyclization has been accomplished using singly occupied molecular orbital (SOMO) catalysis. The presented strategy relies on a selective single-electron oxidation of chiral enamines formed by condensation of polyenals with an imidazolidinone catalyst employing a suitable copper(II) oxidant. The reaction proceeds under mildly acidic conditions at room temperature and shows compatibility with an array of electron-poor as well as electron-rich functional groups. Upon termination by radical arylation, followed by subsequent oxidation and rearomatization, a range of polycyclic aldehydes has been accessed (12 examples, 54-77% yield, 85-93% ee). The enantioselective formation of up to six new carbocycles in a single catalyst-controlled cascade is described. Evidence for a radical-based cascade mechanism is indicated by a series of experimental results.
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影响因子:
15
作者:
Graham TH;Jones CM;Jui NT;MacMillan DW
通讯作者:
MacMillan DW
影响因子:
15
作者:
Heinemann, C;Demuth, M
通讯作者:
Demuth, M
影响因子:
5.2
作者:
Barrero, AF;Herrador, MM;Sánchez, EM
通讯作者:
Sánchez, EM
影响因子:
15
作者:
Heinemann, C;Demuth, M
通讯作者:
Demuth, M
影响因子:
15
作者:
Conrad, Jay C.;Kong, Jongrock;Laforteza, Brian N.;MacMillan, David W. C.
通讯作者:
MacMillan, David W. C.