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- W2076222093 abstract "The preparations of the substituted quinol 3-amino-2-(2,5-dihydroxybenzyl)quinazolin-4(3H)-one and some of its derivatives are described. When this quinol is oxidised with an acidic ferric chloride solution or with an aqueous sodium hydroxide solution a quinone was formed, but it spontaneously ring-closed to give quinazolino[3,2-b]-cinnoline-2,7(13H)-dione, which was isolated as the hydrochloride. When the oxidation of the quinol was carried out with an acidic hydrogen peroxide solution the ring-closed products also formed as an intermediate, which was immediately converted into 1,3,4-trichloroquinazoline[3,2-b]cinnoline-2,7(13H)-dione, and only this dione was then obtained." @default.
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- W2076222093 date "1966-01-01" @default.
- W2076222093 modified "2023-09-26" @default.
- W2076222093 title "Preparation and properties of some substituted quinazolino[3,2-b]-cinnolines" @default.
- W2076222093 doi "https://doi.org/10.1039/j39660002190" @default.
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