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  • Author: Rohollah Rahimi x
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Reza Heydari, Rohollah Rahimi, Mehrnoosh Kangani, Afshin Yazdani-Elah-Abadi and Mojtaba Lashkari


The potassium carbonate was applied as a green and efficient catalyst for the one-pot synthesis of pyran annulated heterocyclic systems, via the condensation between aromatic aldehydes, malononitrile and dimedone/1-naphtole by a grinding method at room temperature and solvent-free conditions. Short reaction times, environmentally friendly procedure and excellent yields are the main advantages of this procedure which makes it more economic than other environmentally synthetic methods.