D(−)-quinic acid 1, was the key step for the construction of the cycloheptanone derivative 8. Its transformation into azidosulfate 18 set the stage for the preparation of the N-protected 8-azabicyclo[3.2.1]octane derivative 22, which, to the best of our knowledge, has been never obtained in optically pure form, as well as the tropan-6α-ol 24, obtained by reduction with LiAlH4.
的碳原子环插入通过α-重氮-β羟基酯中间体的热解,进而由重氮基
乙酸乙酯和3,4-之间反应得到ö异亚丙基-3([R ),4(小号)-dihydroxycyclohexanone 2,一个通过五个步骤从D(-)-
奎尼酸1轻松制备的chiron是构建
环庚酮衍
生物8的关键步骤。其转化为
叠氮硫酸盐18为制备N保护的8-氮杂
双环[3.2.1]辛烷衍
生物22奠定了基础。,其中,以最佳的我们所知,已从未光学纯形式,以及所述tropan-6α醇得到24,通过还原获得的LiAlH 4。