Synthesis of condensed heterocycles from 3-aryl-2,4-dicarbethoxy-5-methylcyclohexanones and their testing for antimicrobial activity
Metwally, M.A.; el-Hossini, M.S.; el-Ablak, F.Z.; Khalil, A.M.
Die Pharmazie 47(5): 336-339
1992
ISSN/ISBN: 0031-7144 PMID: 1409824 Document Number: 398677
Condensation of the title compounds (1) with hydroxylamine hydrochloride, hydrazines and/or aromatic amines resulted in the formation of the benzisoxazoles 2, oximes 3, indazolines 4 and beta-keto anilides 6. The oxime derivatives and anilides underwent cyclization to compounds 2. The interaction between 1 and thiourea gave the benzothiazines 7 and thiouracils 8. Compounds 8 on treatment with monochloroacetic acid gave the dioxo compounds 9, while their reaction with hydrazine hydrate afforded the hydrazino derivatives 10, which upon treatment with nitrous acid gave the azido or tetrazolo derivatives 11 and 12. Treatment of 1 with 2,3-diaminopyridine and/or 2-amino-3-hydroxy-pyridine gave the pyrimidoquinazolines 13 or 14. Some of the synthesized compounds were screened to test their antimicrobial properties.