1,3-dipolar cycloaddition of methyl 3-(1-imidazolyl)acrylate and related compounds

The 1,3-dipolar cycloaddition reaction of 1-vinylimidazole and β-(1-imidazolyl)-α,β-unsaturated carboxylic esters with N.α-diphenylnitrone and acetonitrile oxide was carried out and compared with those of β-pyrrolidinyl- and β-phenyl-α,β-unsaturated carboxylic esters. The imidazolyl moiety bonded to olefinic double bond was suggested to have properties intermediate to pyrrolidinyl and phenyl groups.