A green synthetic approach to the synthesis of Schiff bases from 4-amino-2-thioxo-1,3-diazaspiro[5.5]undec-4-ene-5-carbonitrile as potential anti-inflammatory agents
Abdel-Mohsen, S.A.; Hussein, E.M.
Bioorganicheskaia Khimiia 40(3): 370-376
2014
ISSN/ISBN: 0132-3423 PMID: 25898745 Document Number: 677406
A green, novel, rapid, and efficient protocol is developed for the synthesis of various Schiffbases from 4-amino-2-thioxo-1,3-diazaspiro[5.5]undec-4-ene-5-carbonitrile using ammonium chloride as a very inexpensive and readily available reagent in refluxing ethanol. High yields, easy work-up, and short reaction times are advantages of this environmentally benign procedure. The prepared compounds were screened for their anti-inflammatory activity "at a dose of 10 mg/kg body weight", which revealed promising activities relative to indomethacin used as a reference standard in this study.