3-bromo-1-methyl-1H-1,2,4-triazole-5-carbaldehyde 、
((5,8-dimethyl-[1,2,4]triazolo[1,5-a]pyrazin-2-yl)methyl)triphenylphosphonium chloride 以Chromatography afforded 2-[(E)-2-(5-bromo-2-methyl-2H-[1,2,4]triazol-3-yl)-vinyl]-5,8-dimethyl-[1,2,4]triazolo[1,5-a]pyrazine (258 mg/67.3%) as a white solid的产率得到2-[(E)-2-(5-bromo-2-methyl-2H-[1,2,4]triazol-3-yl)-vinyl]-5,8-dimethyl-[1,2,4]triazolo[1,5-a]pyrazine