2-[(4-Methoxy-3-methyl-phenylamino)-methylene]-malonic acid diethyl ester 、
正己烷 以
二苯醚 为溶剂,
反应 2.0h,
以to give ethyl 6-methoxy-7-methyl-4-oxo-1,4-dihydro-quinoline-3-carboxylate (25.5 g, yield 35%)的产率得到4-Hydroxy-6-methoxy-7-methyl-quinoline-3-carboxylic acid ethyl ester