6-Alkoxy-2-aryl-4H-1,3-oxazin-4-ones 1a-e react with hydrazine (2a) and phenylhydrazine (2b) with ring opening at the C-2-O followed by recyclization to 1,2,4-triazole-5-acetic acid esters 3a-e, Reactions of the title compounds with unsymmetrical dimethylhydrazine 2c led to formation of 2-substituted 4-hydroxyimidazole-4-carboxylates 5a-c.
6- 烷氧基-2-芳基-4H-1,3-恶嗪-4-酮 1a-e 与
肼 (2a) 和苯
肼 (2b) 反应,在 C-2-O 处开环,然后再生成
1,2,4-三唑-5-
乙酸酯 3a-e。