1-isopropyl-4,6-dihydrospiro[indazole-5,4'-piperidin]-7(1H)-one 、
3-carbamoyl-1H-indole-6-carboxylic acid 在
N,N-二异丙基乙胺 、 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28%的产率得到6-[(1-isopropyl-7-oxo-1,4,6,7-tetrahydro-1'H-spiro[indazole-5,4'-piperidin]-1'-yl) carbonyl]-1H-indole-3-carboxamide