3-amino-4-(7-aminomethyl-3,4-dihydro-1H-isoquinolin-2-yl)-cyclobut-3-ene-1,2-dione hydrochloride 、
7-methoxycarbonyl-[1,2,4]triazol[1,5-a]pyrimidine-5-carboxylic acid 在
N-甲基吗啉 、
N-羟基-7-氮杂苯并三氮唑 、 Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以35%的产率得到methyl 5-[[2-(2-amino-3,4-dioxocyclobuten-1-yl)-3,4-dihydro-1H-isoquinolin-7-yl]methylcarbamoyl]-[1,2,4]triazolo[1,5-a]pyrimidine-7-carboxylate