8-Bromo-5-ethoxy-6-(7-methoxy-3-oxo-1,3-dihydro-isobenzofuran-1-yl)-3,4-dihydro-1H-naphthalene-2,2-dicarboxylic acid diethyl ester 在
palladium on activated charcoal
氢气 作用下,
以
溶剂黄146 为溶剂,
以91%的产率得到6-(2-Carboxy-6-methoxy-benzyl)-5-ethoxy-3,4-dihydro-1H-naphthalene-2,2-dicarboxylic acid diethyl ester