Chemistry Department, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia
Stefan Bräse
Institute of Biological and Chemical Systems, IBCS-FMS, Karlsruhe Institute of Technology, 76131, Karlsruhe, Germany; Corresponding author. Institute of Biological and Chemical Systems, IBCS-FMS, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany.
Martin Nieger
Department of Chemistry, University of Helsinki, PO Box 55, A. I. Virtasen Aukio 1, 00014, Helsinki, Finland
Essmat M. El-Sheref
Chemistry Department, Faculty of Science, Minia University, El-Minia, 61519, Egypt
A novel series of 1,2-dihydroquinolinhydrazonopropanoate have been synthesized via a convenient aza-Michael addition reaction between hydrazinylquinolinones and ethyl propiolate in ethanol under refluxing temperature. The structures for all obtained products were confirmed with FTIR, NMR spectrums, as well as mass spectrometry. In addition, the monoclinic structure for compounds 8a, 8c, and 8d was also confirmed via X-ray crystallography analyses. The E-configuration for the obtained products was confirmed form the X-ray analysis. On the other hand, the crystal packing shows that the intermolecular and hydrogen bonds between atoms are parallel to the bc plan.
