Synthesis of Eburnamine, Isoeburnamine, and Eburnamoninevia a Spirocyclic Intermediate
作者:Tse-Lok Ho、Chun-Kuei Chen
DOI:10.1002/hlca.200590216
日期:2005.10
Racemic eburnamonine (1) was synthesized via6, an intermediate possessing local symmetry. Cleavage of the cyclopentene subunit led to pentacyclic aldehydes 8a/8b which on subsequent borohydride and Wolff–Kishner reductions gave 12. The final steps included a RuCl3-catalyzed periodate oxidation and pyridinium chlorochromate (PCC) oxidation. The penultimate intermediates were racemic eburnamine (2) and
外消旋的金枪鱼碱(1)是通过6(一种具有局部对称性的中间体)合成的。环戊烯亚基的裂解产生五环醛8a / 8b,随后硼氢化物和Wolff-Kishner还原得到12。最终步骤包括RuCl 3催化的高碘酸盐氧化和氯铬酸吡啶鎓(PCC)氧化。倒数第二个中间体是外消旋的艾伯胺(2)和外消旋的异艾伯胺(3)。