Condensation and cyclization reactions of 2-hydrazinobenzimidazole,-benzoxazole, and-benzothiazole

…, AM Mahmoud, SA Mahgoub, ZA Hozien

Index: Badr, M. Z. A.; Mahmoud, A. M.; Mahgoub, S. A.; Hozien, Z. A. Bulletin of the Chemical Society of Japan, 1988 , vol. 61, p. 1339 - 1344

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Citation Number: 20

Abstract

2-Hydrazinobenzoxazole (1),-benzimidazole (2), and benzothiazole (3) were condensed with ethyl chloroformate and/or diethyl oxalate to produce, 1, 2, 4-triazolo-and 1, 2, 4-triazino- fused ketones of the title azoles respectively. Condensation of 1 and 2 with aromatic aldehydes and/or acetic anhydride produced, 3-aryl-and 3-methyl-substituted 1, 2, 4-triazolo- fused azoles respectively. The hydrazines 1 and 2 cyclized with acetylacetone to produce ...