Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 86, Issue 21, Pages 14915-14927Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.1c01658
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Funding
- State Key Basic Research Program of the PRC [2018YFC0310900]
- NSFC [21732001, 21871018, 21672017, 21933004]
- Shenzhen Science and Technology Innovation Committee [JCYJ20150529153646078]
- Key-Area Research and Development Program of Guangdong Province [2020B 010188001]
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A novel cobalt-catalyzed reaction has been successfully developed for the annulation of benzoic hydrazides with various alkenes, leading to diverse products; the reaction is suitable for large-scale preparation and efficient removal of the directing group under mild conditions; density-functional theory calculations provide a deeper understanding of the selectivity of different alkenes.
We have developed cobalt-catalyzed, bidentate 2-(1-methylhydrazinyl)pyridine (MHP)-directed C(sp(2))-H alkylation/ annulation of benzoic hydrazides with various alkenes. Notably, diverse cyclopenta[c]isoquinolinones and dihydroisoquinolinones were obtained via this functional group-tolerant protocol. The reaction can be performed on a gram scale while maintaining an excellent yield, and the directing group can be removed efficiently under mild conditions. Furthermore, density-functional theory (DFT) calculations provide an incisive understanding of the observed regioselectivities for different olefins.
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