(4aR,8aR,8bS,8cS)-4a,8a-Dibromo-4,8-dichloro-8b,8c-dimethyl-1,4a,5,8a,8b,8c-hexahydro-cyclopenta[def]fluorene-2,6-dicarboxylic acid dimethyl ester 在
potassium acetate 作用下,
以
乙腈 为溶剂,
反应 12.0h,
以50%的产率得到4,8-Dichloro-8b,8c-dimethyl-8b,8c-dihydro-cyclopenta[def]fluorene-2,6-dicarboxylic acid dimethyl ester