Cycloaddition Approach for the Synthesis of Some Hindered N-Benzoylimidazoles

Abstract

Cycloaddition of N-Benzoyl-4,5-diphenyl-2-strylimidazole to 2,5-dimethyl-3,4-diphenylcyclopentadienone, tetraphenylcyclopentadienone, 1,3-diphenylisobenzofuran and tetraphenylcyclopentadiene afforded the substituted and hindered imidazoles 2a,2b,2c & 2d. The N-benzoyl styrylimidazole 4 derived from phenanthrenequinone, cinnamaldehyde and ammonium acetate also underwent similar cycloaddition.