Abstract
A facile and efficient synthesis of substituted indeno[2,1-c]quinolin-6(7H)-ones from a variety of α-acyl N-arylcinnamamides mediated by polyphosphoric acid (PPA) is described, and a mechanism involving the formation of a dicationic superelectrophile and subsequent double intramolecular nucleophilic cyclization reactions is proposed.
Publication types
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Research Support, Non-U.S. Gov't
MeSH terms
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Catalysis
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Cyclization
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Heterocyclic Compounds, 4 or More Rings / chemical synthesis*
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Heterocyclic Compounds, 4 or More Rings / chemistry
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Indenes / chemical synthesis*
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Indenes / chemistry
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Molecular Structure
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Phosphoric Acids / chemistry*
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Polymers / chemistry*
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Quinolones / chemical synthesis*
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Quinolones / chemistry
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Stereoisomerism
Substances
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Heterocyclic Compounds, 4 or More Rings
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Indenes
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Phosphoric Acids
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Polymers
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Quinolones
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polyphosphoric acid