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- W2072037631 abstract "An application of the phosphine-catalyzed [4 + 2] annulation in the formal synthesis of alstonerine and macroline is reported. A phosphine-catalyzed [4 + 2] reaction between imine 7a and allene 8 formed the D ring of the target indole alkaloids. A subsequent intramolecular Friedel−Crafts acylation provided the C ring of the bridged tetracycle. Deprotection, followed by methylation of the bridged nitrogen, deoxygenation of the C6 ketone, and reduction of the C16 carbethoxy group provided the previously known intermediate 3." @default.
- W2072037631 created "2016-06-24" @default.
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- W2072037631 date "2005-08-23" @default.
- W2072037631 modified "2023-10-18" @default.
- W2072037631 title "An Application of the Phosphine-Catalyzed [4 + 2] Annulation in Indole Alkaloid Synthesis: Formal Syntheses of (±)-Alstonerine and (±)-Macroline" @default.
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- W2072037631 doi "https://doi.org/10.1021/ol051799s" @default.
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