ethyl 2-(3-aminopropanoylamino)-4-methylthiazole-5-carboxylate 、
3-(5-methyl-1,3,4-oxadiazol-2-yl)benzoic acid 在
N,N-二异丙基乙胺 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以14.5%的产率得到ethyl 4-methyl-2-(3-(3-(5-methyl-1,3,4-oxadiazol-2-yl)benzamido)propanamido)thiazole-5-carboxylate