4-Aryl-3-(methanesulfonyl)pyrazolo[5,1-<Emphasis Type="Italic">c</Emphasis>][1,2,4]triazines and their transformations |
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Authors: | I V Ledenyova P A Kartavtsev Kh S Shikhaliev A Yu Egorova |
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Abstract: | Coupling of 3-alkyl-4-aryl-1H-pyrazole-5-diazonium chlorides with methylene-active methyl phenacyl sulfones afforded new pyrazolo5,1-c]1,2,4]triazine derivatives via cyclization of the corresponding intermediate 1-aryl-2-(hetarylhydrazinylidene)-2-(methanesulfonyl)ethanones. The reactivity of the methanesulfonyl group on C3 of pyrazolo5,1-c]1,2,4]triazines toward some nucleophiles was studied. |
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