Pyrrolo[1,2-a]quinoxalines from chalcones: An alternate route
2021
Abstract The synthesis of 2,4-disubstituted pyrrolo[1,2-a]quinoxalines from chalcones is reported. The key steps used are polyphosphoric acid (PPA) assisted acyl rearrangement of the pyrrole ring and Fe catalyzed reduction-cyclization leading to 2,4-disubstituted pyrrolo[1,2-a]quinoxalines. Despite the utilization of comparatively unreactive aromatic ketones, modest to good yields were obtained.
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