Synthesis of allomaltol containing terarylenes with imidazole N-oxides bridge fragment

Method for the synthesis of previously unknown imidazole N-oxides bearing allomaltol unit has been elaborated. The presented approach is based on multicomponent condensation of corresponding oximes containing aroyl and 3-hydroxypyran-4-one fragments with various aldehydes and amines. The advantages of considered method are easily available starting compounds, atom economy, simple experimental procedure including isolation of the final products without column chromatography. The synthetic utility of prepared N-oxides was demonstrated by its further conversion to corresponding 2-chloroimidazole and 2-phenylaminoimidazole derivatives.