Iron-Catalyzed Coupling of Alkenes and Enones: Sakurai-Michael-type Conjugate Addition of Catalytic Allyliron Nucleophiles.
Iron-Catalyzed Coupling of Alkenes and Enones: Sakurai-Michael-type Conjugate Addition of Catalytic Allyliron Nucleophiles.
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DOI:
10.1021/acs.orglett.3c00139
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发表时间:
2023-03-10
期刊:
影响因子:
5.2
通讯作者:
Wang, Yi-Ming
中科院分区:
文献类型:
--
作者:
Scrivener, Sarah G.;Wang, Yidong;Wang, Yi-Ming
The iron-catalyzed coupling of alkenes and enones through allylic C(sp3)–H functionalization is reported. This redox-neutral process employs a cyclopentadienyliron(II) dicarbonyl catalyst and simple alkene substrates to generate catalytic allyliron intermediates for 1,4-addition to chalcones and other conjugated enones. The use of 2,4,6-collidine as the base and a combination of triisopropylsilyl triflate and LiNTf2 as Lewis acids was found to facilitate this transformation under mild, functional group-tolerant conditions. Both electronically unactivated alkenes as well as allylbenzene derivatives could be employed as pronucleophilic coupling partners, as could a range of enones bearing electronically varied substituents.
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