Synthesis of Annulated γ-Carbolines by Palladium-Catalyzed Intramolecular Iminoannulation
摘要:
[GRAPHICS]A variety of N-substituted 2-bromo-1H-indole-3-carboxaldehydes incorporating an alkyne-containing tether on the indole nitrogen have been converted to the corresponding tert-butylimines, which have been subjected to palladium-catalyzed intramolecular iminoannulation, affording various annulated gamma-carbolines in excellent yields.