The Mannich Reaction of Alicyclic α-Diketones. A Novel Synthesis of 2-Hydroxy-3-methyl-2-cyclohexen-1-one
作者:Masao Ohashi、Tadashi Takahashi、Seiichi Inoue、Kikumasa Sato
DOI:10.1246/bcsj.48.1892
日期:1975.6
with 3,6-dimethyl-2-hydroxy-6-morpholinomethyl-2-cyclohexen-1-one (26); 2-hydroxy-3,6,6-trimethyl-2-cyclohexen-1-one could not be obtained under these conditions. The Mannich reaction of other alicyclic α-diketones and the hydrogenolysis of their Mannich bases are also described.
描述了 2-羟基-3-甲基-2-环己烯-1-one (1) 的新合成。环己烷-1,2-二酮 (2) 或 2-morpholino-2-cyclohexen-1-one (3) 与吗啉和福尔马林的曼尼希反应得到曼尼希碱 (4),然后将其氢解得到 1。然而,1 的曼尼希反应仅产生双曼尼希碱 (22),然后类似地将其氢化以提供 3,6-二甲基-2-羟基-2-环己烯-1-酮 (7) 以及 3,6-二甲基-2-羟基-6-吗啉甲基-2-环己烯-1-one (26); 在这些条件下无法获得 2-hydroxy-3,6,6-trimethyl-2-cyclohexen-1-one。还描述了其他脂环族α-二酮的曼尼希反应及其曼尼希碱的氢解。