preprint · Research Square
Abstract Catalyzed by triethylamine (Et 3 N), 4-hydrazino-quinolin-2-one and 2-(1-ethoxy-substituted-ene)malononitrile were refluxed together in ethanol to give 5-amino-3-subsituted-1-(subsitituted-2-oxo-1,2-dihydroquinolin-4-yl)-1 H -pyrazole-4-carbonitriles. The structures of the products were elucidated using 1 H NMR, 13 C NMR, and mass spectra along with elemental analyses. 2D NMR spectroscopy was also used to differentiate the assigned structures from other possible ring systems and regioisomers. A plausible mechanism for the formation of target compounds was discussed.
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DOI: 10.21203/rs.3.rs-2992950/v1
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