| Transition??Metal??Free Intramolecular Ullmann??Type O??Aryl... 
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                            | A Novel Synthesis of 4 H-Chromen-4-ones via Intramolecular W... 
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                            | Oxidation of 4??chromanones with thallium (III) nitrate 
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                            | Photolysis of enol acetates and α??bromo derivatives of o??(... 
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                            | Transition??Metal??Free Intramolecular Ullmann??Type O??Aryl... 
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