反应详情

Tetrahydrofuran (10 mL) solution of 2-(1,3-dioxolan-2-yl)furan (1.0 g, 7.1 mmol) was cooled to −78° C., and n-hexane solution of 1.6 mol/L n-butyllithium (4.5 mL, 7.2 mmol) was dropwise added thereto, and stirred for 3 hours. Tributyltin chloride (2.6 g, 7.9 mmol) was dropwise added to the reaction mixture, and stirred for 5 hours with heating up to room temperature. Water (10 mL) was added to the reaction mixture, and extracted with ethyl acetate (50 mL). The organic layer was dried over anhydrous sodium sulfate, and the solvent was evaporated away under reduced pressure. The resulting residue was purified through silica gel column chromatography (n-hexane to ethyl acetate/n-hexane=1/20) to obtain tributyl[5-(1,3-dioxolan-2-yl)furan-2-yl]tin (2.3 g, 75%).

1. stirringstirred for 5 hours
2. extractionextracted with ethyl acetate (50 mL)
3. dry with materialThe organic layer was dried over anhydrous sodium sulfate
4. customthe solvent was evaporated away under reduced pressure
5. customThe resulting residue was purified through silica gel column chromatography (n-hexane to ethyl acetate/n-hexane=1/20)