A convenient, highly efficient and green approach for synthesis of tetraketones from aromatic aldehydes with dimedone and 1,3-indanedione at room temperature in PEG-400 is described. The use of PEG-400 as the reaction medium and avoiding the use of any catalyst makes the process environmentally benign. Seven new compounds are reported.
. -The reaction is conducted under environmentally benign conditions. The products are purified by recrystallization and the applied solvent can be recycled several times. -(FIROUZEH*, N.; HOSSEIN, K.; Chin.
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