3-amino-N,3-dimethylbutanamide 、 3-((4aS,7aS)-3-carboxy-4,4a,5,6,7,7a-hexahydro-1H-pentaleno[1,2-c]pyrazol-1-yl)pyrazine-1-oxide 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
二氯甲烷 为溶剂,
反应 2.0h,
以30%的产率得到3-((4aS,7aS)-3-((2-methyl-4-(methylamino)-4-oxobutan-2-yl)carbamoyl)-4,4a,5,6,7,7a-hexahydro-1H-pentaleno[1,2-c]pyrazol-1-yl)pyrazine-1-oxide