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Synthesis and Investigation of Mass Spectra of 3-(substituent)-benzopyran[3.2-c]-[1]-benzopyran-6,7-diones
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 Title & Authors
Synthesis and Investigation of Mass Spectra of 3-(substituent)-benzopyran[3.2-c]-[1]-benzopyran-6,7-diones
I. M. EI-Deen; H.K. Ibrahim;
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 Abstract
3-Hydroxybenzopyran[3,2-c]-[1]-benzopyran-6,7-diones (3) and 3-methoxycarbonylcoumarin (4) were prepared via condensation of 1 with resorcinol in the presence of sodium methoxide. The chemical behavior of 3 towards acetic anhydride, alkyl halides and diazonium chloride is described. The electron impact ionization mass spectra of compounds 4,5 and 6a,b show a weak molecular ion peak and a base peak of m/z 89, m/z 280. m/z 91 and m/z 120 resulting from a cleavage fragmentation respectively. The molecular ion of compounds 3, 6b, and 7a is a base peak of m/z 280, m/z 366 and m/z 488 respectively. Compound 7a give a characteristic fragmentation pattern with a two very stable fragmentation of m/z 383 and m/z 77.
 Keywords
Benzopyran[3,2-c]-[1]-benzopyran-6;7-diones;Mass Spectrum;Synthesis;
 Language
English
 Cited by
1.
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Synthesis and characterization of thiazole and 2-thioxoimidazolidinone derivative; their antibacterial and anticancer properties, Research on Chemical Intermediates, 2013, 39, 9, 3949  crossref(new windwow)
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