Transformation of N, N-Dimethylaniline N-Oxides into Diverse Tetrahydroquinoline Scaffolds via Formal Povarov Reactions.
Transformation of N, N-Dimethylaniline N-Oxides into Diverse Tetrahydroquinoline Scaffolds via Formal Povarov Reactions.
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DOI:
10.1021/acs.orglett.8b02318
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发表时间:
2018-09-07
期刊:
影响因子:
5.2
通讯作者:
Chain WJ
中科院分区:
文献类型:
--
作者:
Bush TS;Yap GPA;Chain WJ
A one-pot protocol for the assembly of diversely functionalized tetrahydro-, hexahydrofuro-, hexahydropyrano-, and tetrahydrobenzofuroquinolines from N,N-dimethylaniline N-oxides and various electron-rich olefins in a tandem Polonovski–Povarov sequence is reported. Following activation of the N–O bond with Boc2O, an exocyclic iminium ion is unveiled upon exposure to tin(IV) chloride. A formal inverse-electron-demand aza-Diels–Alder cyclization generates the tetrahydroquinoline core of 29 examples in up to 92% yield.
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