Synthesis of substituted pyridazino[4,5‐c]pyridazines

Abstract

Several pyridazino[4,5c Ipyridazines substituted in t h e 5and 8-positions with hydroxyl, mercapto and amino groups and in the 3-position with a methyl group or a hydrogen atom have been prepared. In the course of this work five previously unreported pyridazine derivatives have also been synthesized.The only reported .derivative of pyridazino[4,5c]pyridazine is the compound described by Gault, et al., (1) namely 4,4a,6,7(2H)-tetrahydropyridazino[ 4,5c Ipyrida-