Transformations of ortho-methoxyaryl(hetaryl)carboxamides into quinazolin-4-one and pyrido[2,3-d]pyrimidin-4-one derivatives
作者:O. B. Ryabova、V. A. Makarov、L. M. Alekseeva、A. S. Shashkov、V. V. Chernyshev、V. G. Granik
DOI:10.1007/s11172-006-0057-x
日期:2005.8
undergo condensation accompanied by the pyrimidine ring closure on refluxing in an excess of sodium methoxide to form bicyclic products, viz., quinazolin-4-one, pyrido[2,3-d]pyrimidin-4-one, and pyrido[4,3-d]pyrimidin-4-one derivatives. The scheme of cyclization processes was proposed. The structures of the reaction products were confirmed by a number of physicochemical data, including X-ray diffraction
摘要在环的 3 位和/或 5 位含有一个或两个硝基的邻氯芳基(杂芳基)甲酰胺在过量甲醇钠回流时缩合伴随嘧啶环闭合形成双环产物,即喹唑啉-4 -one、pyrido[2,3-d]pyrimidin-4-one 和pyrido[4,3-d]pyrimidin-4-one 衍生物。提出了环化工艺方案。反应产物的结构由许多物理化学数据证实,包括 X 射线衍射分析。