Regiospecific carbon—carbon bond formation at α and β positions in cyclic ketones via double Michael addition to α-methylene-β-alkoxy cyclic ketone
作者:Takashi Takahashi、Kimihiko Hori、Jiro Tsuji
DOI:10.1016/0040-4039(81)80164-5
日期:——
Very reactive 2-methylene-3-alkoxycyclohexanone was synthesized. The 1,4-conjugate addition of various nucleophiles to this enone gave only β′-alkylated 2-cyclohexenone with simultaneous elimination of the β-alkoxy group. The second 1,4-conjugate addition of other nucleophile to the resulting cyclohexenone leads to the α and β disubstituted ketones.
合成了高反应性的2-亚甲基-3-烷氧基环己酮。各种亲核试剂向该烯酮的1,4-共轭加成仅产生β'-烷基化的2-环己烯酮,同时消除了β-烷氧基。其他亲核试剂向所得环己烯酮的第二次1,4共轭加成产生α和β双取代的酮。