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Transition metal complexes in organic synthesis. Part 62: Total synthesis of (±)-demethoxycarbonyldihydrogambirtannine and norketoyobyrine by an iron-mediated [2+2+1] cycloaddition

✍ Scribed by Hans-Joachim Knölker; Simon Cämmerer

Publisher: Elsevier Science
Year: 2000
Tongue: French
Weight: 132 KB
Volume: 41
Category: Article
ISSN: 0040-4039
DOI: 10.1016/s0040-4039(00)00766-8

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✦ Synopsis

þ)-Demethoxycarbonyldihydrogambirtannine was obtained in six steps and 49% overall yield from 3,4-dihydro-b-carboline using an iron-mediated [2+2+1] cycloaddition as the key-step. Oxidation of (þ)-demethoxycarbonyldihydrogambirtannine led to norketoyobyrine.

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