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A new approach to pyrrolophenanthridone alkaloids via allene intramolecular cycloaddition: Total synthesis of Hippadine

✍ Scribed by Kenji Hayakawa; Takanori Yasukouchi; Ken Kanematsu

No coin nor oath required. For personal study only.

✦ Synopsis

Combination of the indole synthesis (C-D ring) via intramolecular Diels-Alder reaction of 3-substituted allenic dienamide (5) and base-

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