作者:I. B. Chernikova、S. L. Khursan、L. V. Spirikhin、M. S. Yunusov
DOI:10.1134/s1070428019090045
日期:2019.9
yl chloride, and its bromination afforded ipso-substitution products, 5-bromo-6-methyluracil and 5,5-dibromo-6-hydroxy-6-methyl-5,6-dihydrouracil. The reaction of the title compound with acetic anhydride led to the formation of 6-methyluracil-5-carbonitrile or O-acetyl derivative, depending on the temperature. 7V-Hydroxy-6-methyluracyl-5-carboximidoyl chloride reacted with acetic acid at 100°C or with
在两相体系中对6-甲基尿嘧啶-5甲醛肟进行氧化氯化,得到7V-羟基-6-甲基尿嘧啶-5-羧酰亚胺基氯,其溴化反应可得到ipso取代产物5-溴6-甲基尿嘧啶和5, 5-二溴-6-羟基-6-甲基-5,6-二氢尿嘧啶。取决于温度,标题化合物与乙酸酐的反应导致形成6-甲基尿嘧啶-5-腈或O-乙酰基衍生物。7V-羟基-6-甲基尿嘧啶-5-羧酰亚胺基氯与乙酸在100°C或碘化钾在沸腾的丙酮中反应生成尿嘧啶-5-异羟肟酸,将其高产率转化为相应的甲酯和氢氧酰胺。通过N反应获得季铵盐-羟基-6-甲基尿嘧啶-5-羧酰亚胺基氯与吡啶和1-甲基-1 H-咪唑。