Total Synthesis of (−)-Chiloscyphone, Sesquiterpenoid Isolated from the Liverwort. Absolute Configuration of (−)-Chiloscyphone and (+)-Chiloscypholone
作者:Motoo Tori、Takeshi Hasebe、Yoshinori Asakawa
DOI:10.1246/bcsj.63.1706
日期:1990.6
The absolute configurations of (−)-chiloscyphone and (+)-chiloscypholone isolated from the liverwort Chiloscyphus polyanthos and C. pallescens respectively, have been determined by the total synthesis of the optically active compound. The 1,4-addition of vinylmagnesium bromide to 3,4-dimethyl-2-cyclohexenone in the presence of copper(I) bromide-dimethyl sulfide complex and the subsequent aldol condensation
(-)-chiloscyphone 和 (+)-chiloscypholone 的绝对构型分别从地草 Chiloscyphus polyanthos 和 C. pallescens 中分离出来,已通过光学活性化合物的全合成确定。在溴化铜 (I)-二甲硫醚络合物的存在下,乙烯基溴化镁的 1,4-加成与 3,4-二甲基-2-环己烯酮以及随后在几个步骤中衍生的酮醛的羟醛缩合反应提供了茚酮衍生物。关键中间体醇已通过使用 (1S)-(-)-camphanic 氯化物解决。旋光羟基酯已被转化为 (-)-chiloscyphone。