4.4 Article

Study of Michael addition on chalcones and or chalcone analogues

期刊

JOURNAL OF SAUDI CHEMICAL SOCIETY
卷 16, 期 1, 页码 45-53

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ELSEVIER
DOI: 10.1016/j.jscs.2010.10.017

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Michael addition; Benzothiazine; Benzodiazepine; PTC; Active methylene compounds

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Michael addition reaction of 1,3-diphenyl-propenone 1a, e, and f with o-amino thiophenol in the presence of indium trichloride gave the benzothiazine derivatives 2a-c. Condensation of the compound 1a, e with o-phenylene diamine in triethylamine gave the benzodiazepine derivatives 3a-b. Cyclization of 1d with malononitrile in the presence of NaOR/EtOH gave the compound 4. Addition of thiobarbituric acid in triethylamin to 1a gave 5. Condensation of compound 1c with malononitrile in the presence ammonium acetate gave compound 6. 1,3-diphenyl-propenone 1a used as key starting chalcone to react with different active methylene reagents under phase-transfer catalysis condition gave compound 7-9. The structures of the prepared compounds were mainly confirmed on the basis of spectroscopic methods. (C) 2010 King Saud University. Production and hosting by Elsevier B. V. All rights reserved.

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