tert-butyl 3-ethoxy-5,6-dihydropyrazine-1(2H)-carboxylate 、
tert-butyl 1-(4-chlorophenyl)-2-hydrazinyl-2-oxoethylcarbamate 以
甲苯 为溶剂,
反应 1.0h,
以60%的产率得到tert-butyl 3-((tert-butoxycarbonylamino)(4-chlorophenyl)methyl)-5,6-dihydro-[1,2,4]triazolo[4,3-a]pyrazine-7(8H)-carboxylate