A method has been developed for the synthesis of 1-arylimidazoles lacking a substituent at position 2, featuring the preparation of 1-arylimidazole N-oxides stabilized as boron trifluoride derivatives, with subsequent reduction to the desired imidazoles. This method permits broad variation of the substituents in the aryl part of these molecules.
An expeditious, one-pot and room temperature protocol is reported for the synthesis of 2-chloroimidazoles from imidazole N-oxide. Simple mixing of the imidazole N-oxide, derived easily from diacetyl monoxime via three-component reaction, with oxalyl chloride in an agate mortar and pestle in open air affords the desired products in excellent yields. In view of versatile applications of 2-chloroimidazoles
A method has been developed for the synthesis of 1-arylimidazoles lacking a substituent at position 2, featuring the preparation of 1-arylimidazole N-oxides stabilized as boron trifluoride derivatives, with subsequent reduction to the desired imidazoles. This method permits broad variation of the substituents in the aryl part of these molecules.