9-bromo-6-methyl-4-oxo-6,7,8,9-tetrahydro-4H-pyrido<1,2-a>pyrimidine-3-carboxylic acid 在
氯仿 作用下,
以
吡啶 为溶剂,
反应 72.0h,
以(66.9%) of 1-(6-methyl-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidine-9-yl)-pyridinium bromide is obtained的产率得到1-(6-methyl-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidine-9-yl)-pyridinium bromide