3-吡啶甲醛 、 6-[(2R,5S)-2,5-dimethylpiperazin-1-yl]-3-(trifluoromethyl)-[1,2,4]triazolo[4,3-b]pyridazine 以to give 6-[(2R,5S)-2,5-dimethyl-4-(3-pyridylmethyl)piperazin-1-yl]-3-(trifluoromethyl)-[1,2,4]triazolo[4,3-b]pyridazine in 84% yield的产率得到6-[(2S,5R)-2,5-dimethyl-4-(pyridin-3-ylmethyr)piperazin-1-yl]-3-(trifluoromethyl)[1,2,4]triazolo[4,3-b]pyridazine