N,N´ Bis(arylidene)methanediamines regiospecifically react with 2,3 diphenylcyclo propenone to form stable adducts of both the mono and the diaddition. Ammonium acetate serves as the catalyst of the process. During hydrolysis of these adducts, an oxidative coupling of 1,2 dihydro 3H pyrrol 3 ones occurs with the formation of 2,2´,4,4´,5,5´ hexaaryl 1,1´,2,2´ tetrahydro 3H,3´H 2,2´ bipyrrole 3,3´ diones.

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The title compounds (III) and (VII) react regiospecifically with cyclopropanones to give 2,2′‐diaryl‐tetrahydrobipyrrole‐3,3′‐dione derivatives.

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