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