反应详情

The same operation as in Example (106d) was performed using butyl cis(±)-2-(4-amino-3-methoxypiperidin-1-yl)-5-propyl-1,3-oxazole-4-carboxylate obtained in Example (116c) (0.69 g, 2.0 mmol), 4-chloro-5-ethyl-1H-imidazole-2-carboxylic acid (85% content, 0.2 g, 1 mmol), WSC hydrochloride (0.5 g, 2.5 mmol), HOBt (0.2 g, 1.5 mmol), DMA (3 mL) and dichloromethane (3 mL). The resulting residue was purified by silica gel column chromatography (elution solvent: ethyl acetate/hexane=1/4, 2/3, 3/2, 4/1) to obtain 0.22 g of the title compound as a colorless solid (44%).

1. customThe resulting residue was purified by silica gel column chromatography (elution solvent: ethyl acetate/hexane=1/4, 2/3, 3/2, 4/1)