Ring opening reactions of acetoxydifluorocyclopropanes with various nucleophiles were investigated. Alkaline hydrolysis of acetoxydifluorocyclopropane afforded the α, α-difluoro ketone, α-fluoro enone and, in the case of 4, α-fluoro-β-methoxy ketone (8), while reactions with CH3Li, Grignard reagent and LiAlH4 gave the corresponding fluoro allyl alcohol derivatives (15) exclusively, in good yields. The reaction of 3 with CH3MgI in the presence of CuBr afforded 2-fluoro-3-methylcyclotridecanone (21).
探讨了
醋酸二
氟环丙烷与各种亲核试剂的开环反应。
醋酸二
氟环丙烷的碱性
水解生成了α,α-二
氟酮、α-
氟烯酮,以及在情况下生成的4-α-
氟-β-甲氧基酮(8),而与
CH3Li、格里尼亚试剂和LiAlH4的反应则独占性地生成了相应的
氟烯丙醇衍
生物(15),收率良好。3与CH3MgI在CuBr存在下的反应生成了2-
氟-3-甲基环十三酮(21)。