2,2-dimethyl-propanoic acid 4-[7-(2,2-dimethyl-1-oxopropoxy)-3,4-dihydro-4-oxo-2H-1-benzopyran-3-yl]-phenyl ester 、
4-苄氧基氯化苄 在
magnesium 作用下,
以
四氢呋喃 为溶剂,
以30%的产率得到2,2-dimethyl-propanoic acid 4-[7-(2,2-dimethyl-1-oxopropoxy)-3,4-dihydro-4-hydroxy-4-[[4-(phenylmethoxy)phenyl]methyl]-2H-1-benzopyran-3-yl]phenyl ester