Nitrovinylindoles as Heterotrienes: Electrocyclic Cyclization En Route to β‑Carbolines: Total Synthesis of Alkaloids Norharmane, Harmane, and Eudistomin N
Organic Letters(2022)
Abstract
Unusual cascade transformation was developed involving microwave assisted electrocyclic cyclization of aci (alkylideneazinic acid) forms of nitrovinylindoles acting as heterotrienes. Subsequent one-pot reduction allowed for efficient access to β-carbolines, including several natural products, alkaloids norharmane, harmane and eudistomin N.
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Key words
alkaloids norharmane,electrocyclic cyclization heterotrienes route,synthesis
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