Abstract
Many methods to prepare heterocyclic compounds involve toxic solvents and reagents. There is therefore a need to design cleaner synthetic procedures. 1,6-Naphthyridine derivatives are used in many applications such as cancer chemotherapy, antibacterials, antivirals and antiproliferatives. Here, we report the solvent-free and catalyst-free synthesis of 1,6-naphthyridine derivatives. Synthesis is done by grinding of 2 mmol of ketones, 2 mmol of malononitrile and 1 mmol of amines in a mortar at room temperature for 5–7 min. 1,2-Dihydro[1,6]-naphthyridine derivatives were obtained in 90–97 % yields.
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Abbreviations
- DMSO:
-
Dimethyl sulfoxide
- 1H-NMR:
-
Proton nuclear magnetic resonance spectroscopy
- 13C-NMR:
-
Carbon nuclear magnetic resonance spectroscopy
- TLC:
-
Thin layer chromatography
- IR:
-
Infrared spectroscopy
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Abdel Hameed, A.M. Rapid synthesis of 1,6-naphthyridines by grindstone chemistry. Environ Chem Lett 13, 125–129 (2015). https://doi.org/10.1007/s10311-015-0494-6
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DOI: https://doi.org/10.1007/s10311-015-0494-6