(R)-2-amino-1-((S)-4-(4-chlorophenyl)-4-hydroxy-3,3-dimethylpiperidin-1-yl)-3-methylbutan-1-one hydrochloric acid salt 、
(3R)-3'-methyl-6'-oxo-2',5',6',7',-tetrahydrospiro[cyclopentane-1,4'-pyrazolo[3,4-b]pyridine]-3-carboxylic acid 在
(benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
反应 18.0h,
生成 (1R,3R)-N-((R)-1-((S)-4-(4-chlorophenyl)-4-hydroxy-3,3-dimethylpiperidin-1-yl)-3-methyl-1-oxobutan-2-yl)-3'-methyl-6'-oxo-2',5',6',7'-tetrahydrospiro[cyclopentane-1,4'-pyrazolo[3,4-b]pyridine]-3-carboxamide 、 (1S,3R)-N-((R)-1-((S)-4-(4-chlorophenyl)-4-hydroxy-3,3-dimethylpiperidin-1-yl)-3-methyl-1-oxobutan-2-yl)-3'-methyl-6'-oxo-2',5',6',7'-tetrahydrospiro[cyclopentane-1,4'-pyrazolo[3,4-b]pyridine]-3-carboxamide