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Abstract: A clean aqueous Kröhnke reaction process has been accomplished via a one-pot procedure of 2-acetylpyridine with aromatic aldehyde and ammonium acetate under microwave irradiation or conventional heating conditions. This method is convenient, economic and environmental friendly. [Copyright &y& Elsevier]

Abstract: A simple and efficient synthesis of 2-amino pyrido[2,3-d]pyrimidine derivatives was accomplished via a three-component reaction under microwave irradiation without catalyst. This method had many dramatic advantages such as the short reaction time, high yield, and broad substrate scope, as well as convenient operation. We provide new series of potential biologically active compounds as inhibitors of Cdk4. [Copyright &y& Elsevier]

Abstract: A series of N-substituted 4-aryl-4,6,7,8-tetrahydroquinoline-2,5(1H,3H)-diones were synthesized through a rapid one-pot four-component reaction under microwave irradiation. The method has the advantages of excellent yields (82–96%) and short reaction time (4–9min). We provide new series of potential biologically active compounds for biomedical screening. [Copyright &y& Elsevier]