反应详情

To a solution of 7-chlorothieno[3,2-b]pyridine (2) (2 g, 11.83 mmol) in THF (40 mL) n-BuLi (2.5M in hexanes, 5.7 mL, 14.2 mmol) was added dropwise at −78° C. and the reaction mixture stirred 1 h. DMF (2.7 mL, 35.5 mmol) was added and stirring continued 1 h more. The reaction mixture was poured into water, extracted with EtOAc, the combined organics dried over anhydrous Na2SO4, and concentrated under reduced pressure. The residue was triturated with ether and filtered affording title compound 232 (2 g, 10.12 mmol, 86% yield). MS (m/z): 197.9 (36%), (M+MeOH+1) 230.0 (100%).

1. stirringstirring continued 1 h more
2. extractionextracted with EtOAc
3. dry with materialthe combined organics dried over anhydrous Na2SO4
4. concentrationconcentrated under reduced pressure
5. customThe residue was triturated with ether
6. filtrationfiltered