gave (+)-[1.0]triblattane. BF3-Catalyzed diazomethane ring expansion of (+)-17 was followed by Wolff-Kishner reduction to afford optically active [m.0]triblattanes. (+)-Tetracyclo[5.2.12,6.04,8]decan-5-one ([1.1]triblattan-5-one) with known absolute configuration and absolute rotation was transformed to optically active [m.1]triblattanes by diazomethane ring expansion with BF3 etherate followed by
马肝
酒精脱氢酶介导的四环 [4.3.0.02,5.03,8]nonan-9-one ([1.0]triblattan-9-one) (17) 还原得到 (+)-17 和 (-)-四环 [4.3。 0.02,5.03,8]
壬烷-9-醇(18)。(+)-17 与 5%
铑-氧化铝氢解为 (+)-(1R,3R,6R8R)-twist-brendan-9-ol 已知绝对旋转允许我们指定 1S,2S,3R,5R, 6R,8R 绝对配置为 (+)-17 并计算 (+)17 的绝对旋转。(+)-17的Wolff-Kishner还原得到(+)-[1.0]triblattane。(+)-17 的
BF3 催化
重氮甲烷环膨胀,随后进行 Wolff-Kishner 还原,以提供光学活性 [m.0] triblattanes。(+)-Tetracyclo[5.2.12,6.04,8]decan-5-one ([1