反应详情

To a solution of 5-methyl-4-oxo-3,4-dihydrothieno[2,3-d]pyrimidine-6-carboxylic acid, (0.42 g, 2 mmol) in 1:1 DCM and DMF (10 mL) was added EDC (0.764 g, 4 mmol), DMAP (cat.) and 4-phenylpiperazine (0.324 g, 2 mmol). The reaction was stirred at RT overnight and DCM was removed. The resultant residue was partitioned between EtOAc (50 mL) and H2O (50 mL). The organic layer was dried over Na2SO4 and concentrated to provide 0.4 g 5-methyl-6-(4-phenylpiperazine-1-carbonyl)thieno[2,3-d]pyrimidin-4(3H)-one, (yield: 57%).

1. customDCM was removed
2. customThe resultant residue was partitioned between EtOAc (50 mL) and H2O (50 mL)
3. dry with materialThe organic layer was dried over Na2SO4
4. concentrationconcentrated