Palladium‐catalyzed domino reaction for the synthesis of benzo‐cyclohepta‐quinolinone analogues from Cedrus deodara oil

Abstract

First‐time vinyl bromide‐substituted benzocycloheptene compound has been explored as a precursor for the synthesis of benzo‐cyclohepta‐quinolinone (BCQ) analogues following a domino reaction. The vinyl bromide‐substituted benzocycloheptene was synthesized from himachalenes, extracted from Cedrus deodara oil. The reaction proceeds through C‐C bond formation followed by palladium catalyzed C‐N cross‐coupling and dehydrogenative aromatization in a consecutive and atom‐economic approach for BCQ analogues synthesis. Moreover, the present methodology is applicable for various substituted β‐enaminones with good to moderate yield.