(2E)-2-{1-[5-methoxy-1-(4-methoxyphenyl)-2-methyl-1H-indol-3-yl]ethylidene}-3-(1-methylethylidene)butanedioic acid 在
乙酰氯 作用下,
以95%的产率得到(3E)-3-{1-[5-methoxy-1-(4-methoxyphenyl)-2-methyl-1H-indol-3-yl]ethylidene}-4-(1-methylethylidene)tetrahydro-2,5-furandione