4-Functionally Substituted 3-Hetarylpyrazoles: XX. Synthesis of Derivatives of 5-(Pyrasol-4-yl)-1,2,4-triazole and 3-(Pyrazol-4-yl)-1,2,4- triazolo[3,4-c][1,4]oxazine

摘要

N-Methylimines of 3-aryl-l-phenylpyrazole-4-carbaldehyde react with ethyl 2-aryl-hydrazino-2-chloroacetate with the formation of ethyl l-aryl-5-(pyrazole-4-yl)-4,5-dihydro-1H-1,2,4-triazolecarboxylates. Analogous reactions of pyrazol-4-carbaldehyde N-(2-hydroxy)ethylimines results in derivatives of 3-(pyrazol-4-yl)-1,2,4-triazolo[3,4-c][1,4]-oxazines.