Synthesis of 3‐substituted‐2,3,4,5‐tetrahydro‐1 H ‐naphth[1,2‐ d ]‐imidazole‐2,4,5‐triones and 1‐Substituted‐2,3,4,9‐tetrahydro‐1 H ‐naphth[2,3‐ d ]imidazole‐2,4,9‐triones

Tricyclic compounds with an imidazolinone ring fused to 1,2‐ and 1,4‐naphtoquinones were synthesized by a reaction of 4‐amino‐1,2‐naphthoquinone and 2‐amino‐1,4‐naphthoquinone with electrophilic symmetric and non symmetric diazenes.