2.4-dimethyl-3-formyl-4-ethoxycarbonylcyclohex-2-enone 、
(2E,4E)-5-ethoxycarbonyl-2-methyl-2,4-pentadienyltriphenylphosphonium bromide 以
二氯甲烷 为溶剂,
反应 5.0h,
以88.6%的产率得到rac-ethyl (2E,4E,6E)-5-methyl-7-(2,6-dimethyl-6-ethoxycarbonyl-3-oxo-1-cyclohexenyl)-2,4,6-heptatrienoate