Palladium-Catalyzed Synthesis of 4-Aminoquinazolines from Amide Oxime Ethers and 2-Iodobenzonitrile

Resumo

4-Substituted O-benzyl benzamide oximes reacted with 2-iodobenzonitrile in the presence of 0.1 mol % of [Pd₂(dba)₃], 0.2 mol % of XantPhos, and 1.5 equiv of Cs₂CO₃ in dioxane under argon to give 2-arylquinazolin-4-amines. The described reaction is a new type of cascade processes, which affords 4-amino-quinazoline derivatives without using highly reactive chlorinating agents.