Homolytische Phenylierung einiger Azolopyridazine

Imidazo[1.2-b]-,s-Triazolo[4.3-b]- ands-Triazolo-[2.3-b]pyridazines and their derivatives were submitted to homolytic phenylation and the reaction mixtures obtained separated by chromatography into individual components which were then identified. Homolytic phenylation takes place preferentially at position 8 of all systems investigated, whereas a lower selectivity was observed for positions 7 and 3.