反应详情

To a stirred suspension of 6-bromo-1,2,2-trimethyl-2,3-dihydrothieno[3,2-d]pyrimidin-4(1H)-one (259 mg, 0.941 mmol) in THF (10 mL) at −78° C. was added dropwise 1.6 M n-butyllithium in hexane (1.29 mL, 2.07 mmol). After 20 min, DMF (0.146 mL, 1.88 mmol) was added, and the mixture was allowed to −30° C. for 30 min. The mixture was poured into water (50 mL) and brine (50 mL). Extraction with EtOAc (100 mL), washing with brine, drying over MgSO4, filtration and concentration under reduced pressure gave the title compound (205 mg, 97%) as yellow solid:

1. waitthe mixture was allowed to −30° C. for 30 min
2. extractionExtraction with EtOAc (100 mL)
3. washwashing with brine
4. dry with materialdrying over MgSO4, filtration and concentration under reduced pressure