6'-Benzyloxy-5,5'-dimethoxy-6-methoxycarbonyloxy-3-methyl-biphenyl-2,2'-dicarboxylic acid dimethyl ester 在
palladium on activated charcoal
氢气 作用下,
以
1,4-二氧六环 、
甲醇 为溶剂,
以92%的产率得到6'-Hydroxy-5,5'-dimethoxy-6-methoxycarbonyloxy-3-methyl-biphenyl-2,2'-dicarboxylic acid dimethyl ester