期刊
ORGANIC CHEMISTRY FRONTIERS
卷 9, 期 10, 页码 2621-2626出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2qo00275b
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资金
- NNSFC [22001059]
- Top-Notch Talents Program of Henan Agricultural University [30500739]
This study presents a novel copper-catalyzed reaction for the efficient synthesis of diverse spiroindoles with various functional groups. It also demonstrates the successful construction of challenging carbon-carbon bonds and alkenes.
Described herein is a novel copper-catalyzed multifunctionalization of alkyne-tethered indoles, allowing the practical and efficient synthesis of a diverse array of valuable dihalogen-substituted spiroindoles containing tetrasubstituted alkenes which can be readily functionalized further to obtain various spiroindolines. The construction of synthetically challenging quaternary spirocyclic carbons and tetrasubstituted alkenes is easily achieved in a single operation. Importantly, an unexpected dearomatization of alkyne-tethered indoles via Michael-type addition is involved in this tandem sequence. Furthermore, this Cu catalysis is also applicable to the regioselective synthesis of cyclopenta[c]quinolin-3-ones from readily available indolyl ynone homologues by skeletal rearrangement.
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