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- W2949528056 abstract "The one-pot, four-component reaction of phthalic anhydride, hydrazine hydrate, aromatic aldehydes and malononitrile afford 3-amino-1-aryl-5,10-dioxo-1H-pyrazolo[1,2-b]phthalazine-2-carbonitrile derivatives in the presence of potassium carbonate in ethanol under reflux conditions. These conditions offer simplified operation, easy purification, excellent yields and environmentally benign reaction conditions. Also, this method avoids the use of expensive catalysts, toxic solvents and chromatographic separation." @default.
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- W2949528056 date "2015-08-01" @default.
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- W2949528056 title "Four-Component Synthesis of 3-Amino-1-Aryl-5,10-Dioxo-1H-Pyrazolo[1,2-b] Phthalazine-2-Carbonitrile Derivatives Promoted by Potassium Carbonate" @default.
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- W2949528056 doi "https://doi.org/10.3184/174751915x14382558688543" @default.
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