ethyl 6-methyl-2-oxo-4-phenyl-2H-chromene-3-carboxylate 、
异丙醚 在
palladium-carbon 作用下,
以
溶剂黄146 为溶剂,
生成 3,4-dihydro-6-methyl-2-oxo-4-phenyl-2H-1-benzopyran-3-carboxylic acid ethyl ester 、
3,4-Dihydro-6-methyl-2-oxo-4-phenyl-2H-1-benzopyran-3-acetic acid