Synthesis of (1,5)-karahana ether and (1,5)-karahana lactone, the optically active forms of unique monoterpenes wit
作者:Kenji Mori、Hideto Mori
DOI:10.1016/s0040-4020(01)91348-1
日期:1985.1
(1S,5R)-(-)-Karahana ether (8,8-dimethyl-2-methylene-6-oxabi-cyclo[ 3.2.1]octane) and (1S,5R)-(-)-karahana lactone (8,8-dimethyl-2-methylene-6-oxabicyclo [3.2.1]octan-7-one) were synthesized from (S)-3-hydroxy-2,2-dimethylcyclo-hexanone. The natural karahana lactone was shown to be almost racemic (ca. 1.3 % e.e.).
(1S,5R)-(-)-Karahana醚(8,8-二甲基-2-亚甲基-6-氧杂双环[3.2.1]辛烷)和(1S,5R)-(-)-卡拉汉纳内酯(8由(S)-3-羟基-2,2-二甲基环己酮合成了1,8-二甲基-2-亚甲基-6-氧杂双环[3.2.1] octan-7-酮。天然卡拉汉纳内酯显示出几乎是外消旋的(约1.3%ee)。