[(2,4-dimethoxyphenyl)methyl]-(2-propynyl)propanedioic acid diethyl ester 在
dichlorotricarbonylruthenium(II) dimer
silver trifluoromethanesulfonate 作用下,
以
甲苯 为溶剂,
反应 68.0h,
以4%的产率得到1,2-dihydro-6,8-dimethoxy-4-methyl-2,2-naphthalenedicarboxylic acid diethyl ester