Reactions of Unsaturated 1,3-Oxazines; I. Reaction of 6-Alkoxy-2-aryl-4H-1,3-oxazine-4-one with Hydrazine Derivatives
作者:A. V. Prep'yalov、I. P. Yakovlev、V. E. Zakhs
DOI:10.1055/s-1999-3409
日期:1999.3
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。