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- W1996922666 abstract "3,5-Diaeetamidopyrazole (2) could be prepared via arylazo group decoupling from 3,5-diamino-4-arylazopyrazoles (1a-c) by the action of acetic acid-sulfuric acid mixture. Arylazo group removal could also be effected when 2-amino-5-melhyl-7-oxo-6,7-dihydro-3-phenylazopyrazolo-[1,5-α]pyrimidine (5) was similarly treated. The 2-aminopyrazolo[1,5-α]pyrimridine derivative was obtained in this case. On the other hand, under the same experimental conditions compounds 7a-c and 8 were recovered almost unaffected. The mechanism of the reaction is discussed." @default.
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- W1996922666 date "1977-02-01" @default.
- W1996922666 modified "2023-10-16" @default.
- W1996922666 title "Pyrimidine derivatives and related compounds VI. A novel synthesis of 3,5-diacetamidopyrazole and of 2-aminopyrazolo [1,5-α] pyrimidines" @default.
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- W1996922666 doi "https://doi.org/10.1002/jhet.5570140132" @default.
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