Simple and convenient routes to the title compounds using photoaddition of 5,6-dichloro-2-cyclohexene-1,4-dione to olefins, followed by reduction with a low valent nickel complex or by dehydrochlorination with 2,6-lutidine as key steps are described.
使用
5,6-二氯-2-环己烯-1,4-二酮光加成到烯烃,然后用低价
镍络合物还原或用 2,6-二
甲基吡啶脱
氯化氢作为关键步骤,获得标题化合物的简单方便的路线被描述。