A catalytic, enantioselective formal synthesis of (+)-dichroanone and (+)-taiwaniaquinone H.
A catalytic, enantioselective formal synthesis of (+)-dichroanone and (+)-taiwaniaquinone H.
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DOI:
10.1021/ol5031537
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发表时间:
2014-12-19
期刊:
影响因子:
5.2
通讯作者:
Stoltz, Brian M.
中科院分区:
文献类型:
--
作者:
Shockley, Samantha E.;Holder, Jeffrey C.;Stoltz, Brian M.
A catalytic, enantioselective formal synthesis of (+)-dichroanone and (+)-taiwaniaquinone H is reported. The all-carbon quaternary stereocenter was constructed by asymmetric conjugate addition catalyzed by a palladium(II) (S)-tert-butylpyridinooxazoline complex. The unexpected formation of a [3.2.1] bicyclic intermediate required the identification of a new route. Analysis of the Hammett constants for para-substituted arenes enabled the rational design of a highly enantioselective conjugate addition substrate that led to the completion of the formal synthesis.
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