Heterocyclic synthesis from 3-amino-4-cyanopyrazole

…, AA El-Hamid, AMA El-Hamid

Index: Deeb, Ali; El-Mobayed, Medhat; Essawy, Abdel Naby; El-Hamid, Adel Abd; El-Hamid, Atef Mohamid Abd Collection of Czechoslovak Chemical Communications, 1990 , vol. 55, # 3 p. 728 - 733

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Citation Number: 10

Abstract

Abstract 3-Amino-4-cyanopyrazole I reacts with hydroxylamine and with hydrazine to yield 1H, 6H-3-aminopyrazolo [3, 4-c] pyrazole (III and IV). Diazotized IV couples with 2-naphthol to give the arylazo derivative VI which cyclizes to 9H-naphthol [2, 1-e] pyrazolo [3', 4': 3, 4] pyrazolo [5, 1-c]-[1, 2, 4] triazine VII by means of acetic acid. The pyrazol-5-ylthiourea obtained from I and phenyl isothiocyanate undergoes base-catalyzed cyclization to give ...