Journal
ORGANIC LETTERS
Volume 22, Issue 18, Pages 7152-7157Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.orglett.0c02506
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Funding
- NSFC [21877020]
- Guangdong Natural Science Funds for Distinguished Young Scholar [2017A030306031]
- Natural Science Foundation of Guangdong Province [2019A1515010935]
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The redox-neutral Ir(III)- or Ru(II)-catalyzed C-H couplings of azomethine imines with a,a-difluoromethylene alkynes have been realized, leading to the efficient synthesis of indenopyrazole frameworks via a tandem C-H functionalization/[3 + 2] dipolar cycloaddition/ring-opening aromatization rearrangement process, in which the generated fluoroallene species was involved as the dipolarophile via a selective beta-F elimination process. Subsequent biological evaluation revealed that these synthesized indenopyrazoles could serve as interesting cytotoxic agents for further development.
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