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Greener, Simple and Efficient Synthesis of Some Oxazine-2-amine Derivatives by Preheated Fly-Ash Catalyzed Cyclization of Aryl Chalcones under Solvent-Free Conditions

Author(s): G. Thirunarayanan

To synthesize some aryl oxazine amines including 4-(4-methoxy-1-naphthyl)-6-(substituted phenyl)-4H-5,6-dihydro- 1,3-oxazine-2-amines by preheated fly-ash catalyzed solvent-free cyclization of aryl chalcones and urea under microwave irradiation, the yields of the oxazines were more than 50%. These oxazine imines were characterized by their physical constants and spectroscopic data.

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