反应详情

A solution of 0.124 g (0.39 mmol) of 5-(3-benzofuran-2-yl-phenyl)-2-methyl-2H-pyrazole-3-carboxylic acid in 1.28 ml of DMF was treated with 0.063 g (0.39 mmol) of CDI. After 4 h, 0.055 g (0.39 mmol) of 3-(diethylamino)pyrrolidine and 0.217 ml (1.56 mmol) of Et3N in 1.28 ml of DMF were added and stirring was continued for 2 h. The solution was partitioned between aqueous saturated NaHCO3/Et2O (3×). The organic phases were washed with aqueous saturated NaHCO3 and aqueous 10% NaCl, dried (Na2SO4) and evaporated. The crude product was crystallized with Et2O/pentane to give 0.130 g (75%) of [5-(3-benzofuran-2-yl-phenyl)-2-methyl-2H-pyrazol-3-yl]-(3-diethylamino-pyrrolidin-1-yl)-methanone as light pink powder. MS: 443.2 (MH+).

1. waitwas continued for 2 h
2. customThe solution was partitioned between aqueous saturated NaHCO3/Et2O (3×)
3. washThe organic phases were washed with aqueous saturated NaHCO3 and aqueous 10% NaCl
4. dry with materialdried (Na2SO4)
5. customevaporated
6. customThe crude product was crystallized with Et2O/pentane