Abstract
A series of 6-amino-8-aryl-2-methyl-1,2,3,4-tetrahydroisoquinoline-5,7-dicarbonitriles were prepared in good yields under solvent-free conditions by multicomponent reactions of aromatic aldehyde, malononitrile, and 1-methylpiperidin-4-one in the presence of sodium hydroxide (NaOH). The structures of the products were characterized by infrared, 1H NMR spectra, elemental analysis, and high-resolution mass spectrometery (HRMS).
ACKNOWLEDGMENTS
We thank the Natural Science Foundation of Jiangsu Education Department (No. 08KJB150017) and the Pei Yu Foundation (No. 07PYL06) of Xuzhou Normal University for financial support.