4-methyl-N
1-phenylbenzene-1,2-diamine dihydrochloride 、
3-(2-methyl-3-oxopyrido[2,3-b]pyrazin-4(3H)-yl)propanoic acid 在
1-[bis(dimethylamino)methylene]-1H-1,2,3-triazolo[4,5-b]pyridinium 3-oxid hexafluorophosphate 、
N,N-二异丙基乙胺 、
溶剂黄146 作用下,
以
二氯甲烷 为溶剂,
反应 24.0h,
以77%的产率得到2-methyl-4-[2-(5-methyl-1-phenyl-1H-benzimidazol-2-yl)ethyl]pyrido[2,3-b]pyrazin-3(4H)-one