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Synthesis of some pyridine,thiopyrimidine, and isoxazoline derivatives based on the pyrrole moiety
Authors:Mohamed A A Radwan  Eman M H Abbas
Institution:(1) Applied Organic Chemistry Department, National Research Centre, Dokki, Cairo, Egypt;(2) Department of Chemistry of Natural products, National Research Centre, Dokki, Cairo, Egypt
Abstract:Abstract  Condensation of 2-acetylpyrrole with 5-methylfuran-2-carboxyaldehyde and 4-chlorobenzaldehyde in 20% NaOH give the corresponding 2-chalconylpyrroles. Some new 2-alkoxy-3-cyano-4,6-diarylpyridines were synthesized by condensation of chalcones with malononitrile, followed by cyclization in sodium alkoxide. The reactivity of chalcones towards nitrogen nucleophiles such as thiourea and hydroxylamine hydrochloride to provide thiopyrimidines and isoxazolines was investigated. Graphical Abstract   MediaObjects/706_2008_61_Figa_HTML.gif
Keywords:Pyrroles  Pyridines  Thiopyrimidine  Isoxazoline
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