Synthesis of chromeno[2′,3′:4,5]imidazo[2,1-a]isoquinolines via a novel domino reaction of isoquinoline-derived immonium salts. Scope and limitations

A one-pot protocol towards chromeno[2′,2′:4,5]imidazo[2,1-a]isoquinoline derivatives via a domino reaction of isoquinoline-derived immonium salts and α-hydroxy aromatic aldehydes is elaborated. The scope and limitations of this reaction is discussed.

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