8-allyl-5-(3-methyl-butoxy)-4-oxo-4H-chromene-2-carboxylic acid 、
哌啶 在
苯 、 petroleum ether 作用下,
以
乙醇 为溶剂,
反应 2.0h,
以to give 6 parts of 8-allyl-5-(3-methyl-n-butoxy)-4-oxo-4H-1-benzopyran-2-carboxylic acid piperidine salt as a white solid m.p. 106°-107° C.的产率得到8-allyl-5-(3-methyl-n-butoxy)-4-oxo-4H-1-benzopyran-2-carboxylic acid piperidine salt