Photochemical transformations of 3,3,4,7-tetramethylpyrazolo[3,4-d]pyridazine in solution and frozen gas matrices
Abstract
Photochemical transformations of pyrazolopyridazine 1 give isopropenylpyridazine 2 in addition to cyclopropapyridazine 3 in solution and to the ring-opened diazo isomer 4 observed in frozen gas matrices.