(5S)-2-((4R)-4-hydroxypyrrolidin-2-yl)-5-methyl-5-(4-(4-methylthiazol-5-yl)phenyl)-1,5-dihydro-4H-imidazol-4-one hydrochloride   、                                                                                      
3-methyl-2-(1-methyl-1H-pyrazol-4-yl)butanoic 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,
                                                                                                                                                    反应 1.0h,
                                                                                                                生成                                                 (S)-2-((2R,4R)-4-hydroxy-1-((S)-3-methyl-2-(1-methyl-1H-pyrazol-4-yl)butanoyl)pyrrolidin-2-yl)-5-methyl-5-(4-(4-methylthiazol-5-yl)phenyl)-1,5-dihydro-4H-imidazol-4-one   、                                                                                             (S)-2-((2S,4R)-4-hydroxy-1-((R)-3-methyl-2-(1-methyl-1H-pyrazol-4-yl)butanoyl)pyrrolidin-2-yl)-5-methyl-5-(4-(4-methylthiazol-5-yl)phenyl)-1,5-dihydro-4H-imidazol-4-one   、                                                                                             (S)-2-((2R,4R)-4-hydroxy-1-((R)-3-methyl-2-(1-methyl-1H-pyrazol-4-yl)butanoyl)pyrrolidin-2-yl)-5-methyl-5-(4-(4-methylthiazol-5-yl)phenyl)-1,5-dihydro-4H-imidazol-4-one   、                                                                                             (S)-2-((2S,4R)-4-hydroxy-1-((S)-3-methyl-2-(1-methyl-1H-pyrazol-4-yl)butanoyl)pyrrolidin-2-yl)-5-methyl-5-(4-(4-methylthiazol-5-yl)phenyl)-1,5-dihydro-4H-imidazol-4-one