Synthesis of Imidazo-1,3-diazabiphenylene (lin-Benzocyclobutadienopurine), a Ring System Having a Benzocyclobutadieno Spacer between the Terminal Rings of Purine.
Two distinct syntheses of the pyrimidoimidazocinnoline ring system have been accomplished.The first of these began with 2-acetamido-4-chloro-5-nitroacetophenone, which was elaborated sequentially by fusion of the imidazole, pyridazine, and p
d'Alarcao, Marc,Bakthavachalam, Venkatesalu,Leonard, Nelson J.