Abstract
The aldimine-directed C-H amidation of various arenes with N-acyl azides as amidation surrogates under cationic iridium(III) catalysis is described. This transformation efficiently provides a range of 2-aminobenzaldehyde derivatives with excellent site selectivity and functional group compatibility. The resulting 2-aminobenzaldehyde framework provides facile access to a range of biologically interesting heterocycles. In addition, all synthetic compounds were screened for anti-inflammatory activity against interleukin-1β (IL-1β) and tumor necrosis factor alpha (TNF-α) with lipopolysaccharide (LPS)-induced RAW264.7 cells. Generally, a range of ortho-amidated benzaldehydes displayed promising inhibitory activity against IL-1β and TNF-α compared to dexamethasone as a positive control. Notably, compounds (3ae and 4ac) were found to exhibit potent anti-inflammatory activity stronger than that of dexamethasone.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Amides / chemical synthesis
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Amides / chemistry
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Amides / pharmacology
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Animals
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Anti-Inflammatory Agents, Non-Steroidal / chemical synthesis
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Anti-Inflammatory Agents, Non-Steroidal / chemistry
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Anti-Inflammatory Agents, Non-Steroidal / pharmacology*
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Azides / chemistry*
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Benzaldehydes / chemical synthesis
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Benzaldehydes / chemistry
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Benzaldehydes / pharmacology*
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Catalysis
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Cell Survival / drug effects
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Cells, Cultured
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Imines / chemistry*
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Interleukin-1beta / antagonists & inhibitors*
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Iridium / chemistry
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Lipopolysaccharides / antagonists & inhibitors
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Lipopolysaccharides / pharmacology
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Mice
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Molecular Structure
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Organometallic Compounds / chemistry
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RAW 264.7 Cells
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Tumor Necrosis Factor-alpha / antagonists & inhibitors*
Substances
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Amides
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Anti-Inflammatory Agents, Non-Steroidal
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Azides
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Benzaldehydes
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Imines
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Interleukin-1beta
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Lipopolysaccharides
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Organometallic Compounds
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Tumor Necrosis Factor-alpha
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Iridium
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2-aminobenzaldehyde