Reaction of benzonitrilium N-phenylimide with (Z)-4-arylmethyleneimidazol-5(4H)-ones

摘要

The title reaction,when carried out in chloroformin the presence of triethylamine,yields the spirocycloadducts 5 which upon treatment with a base affords 1,3,4-triaryl-5-pyrazolecarboxamides 12.