((5,8-dimethyl-[1,2,4]triazolo[1,5-a]pyrazin-2-yl)methyl)triphenylphosphonium chloride 、
5-pyrrolidin-1-yl-2-(2,2,2-trifluoro-ethyl)-2H-[1,2,4]triazole-3-carbaldehyde 以Chromatography afforded 5,8-dimethyl-2-{2-[5-pyrrolidin-1-yl-2-(2,2,2-trifluoro-ethyl)-2H-[1,2,4]triazol-3-yl]-vinyl}-[1,2,4]triazolo[1,5-a]pyrazine (20 mg/27.5%) as a white viscous oil的产率得到5,8-dimethyl-2-{2-[5-pyrrolidin-1-yl-2-(2,2,2-trifluoro-ethyl)-2H-[1,2,4]triazol-3-yl]-vinyl}-[1,2,4]triazolo[1,5-a]pyrazine