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- W2953297079 abstract "A facile synthesis of a series of novel bromo-, arylazo-, and heterocyclic fused troponoid compounds containing 1,3-benzodioxole system is described. The 7-bromo-, 5,7-dibromo-, and 5-arylazo-substituted 3-[(2E)-3-(1,3-benzodioxol-5-yl)prop-2-enoyl]tropolones (2, 3, and 5, 6, 7) were obtained by direct bromination or azo-coupling reactions of 3-[(2E)-3-(1,3-benzodioxol-5-yl)prop- 2-enoyl]tropolone (1) with bromine, and diazonium salts of aniline derivatives, respectively. 3-[(2E)-3-(1,3-Benzodioxol-5-yl)prop-2-enoyl]-5-bromotropolone (4) was obtained from 3-acetyl-5-bromotropolone via one-pot aldol dehydration reaction with piperonal. Tropolones 2, 3, and 4 were subjected to nucleophilic cyclization with bifunctional hydroxylamine hydrochloride and phenylhydrazine hydrochloride to give the corresponding isoxazolo- and pyrazolo-fused tropones (8, 9, 10, 11, 12, 13), respectively. J. Heterocyclic Chem., (2012)." @default.
- W2953297079 created "2019-06-27" @default.
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- W2953297079 date "2011-10-21" @default.
- W2953297079 modified "2023-10-18" @default.
- W2953297079 title "Synthesis and characterization of bromo-, arylazo-, and heterocyclic-fused troponoids containing a 1,3-benzodioxole system" @default.
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- W2953297079 doi "https://doi.org/10.1002/jhet.702" @default.
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