2-methyl-N-(1-(1-methyl-1,2,3,4-tetrahydroquinolin-6-yl)butylidene)propan-2-amine 、
甲烷三甲酸三甲酯 在
乙醚 作用下,
以
二乙二醇二甲醚 为溶剂,
反应 4.0h,
以to afford the title compound as a yellow solid (150 mg, 0.44 mmol, 6.5% over two steps)的产率得到methyl 5-ethyl-4-hydroxy-6-(1-methyl-1,2,3,4-tetrahydroquinolin-6-yl)-2-oxo-1,2-dihydropyridine-3-carboxylate