3-Alkenyl-5-ferrocenyl-2-pyrazolines in reactions with azodicarboxylic acid N-phenylimide

Article abstract of DOI:10.1007/BF02494717

Azodicarboxylic acid N-phenylimide reacts with 1-acetyl-3-(2-ferrocenylethenyl)-5-ferrocenyl-2-pyrazoline according to the [4+2]-cycloaddition mechanism to form a Diels - Alder adduct. Under analogous conditions, 1-acetyl-5-ferrocenyl-3-(1-cyclohexenyl)-substituted 2-pyrazolines containing allylic hydrogen atoms give monoene addition products.