反应详情

To a solution of 4,8-dioctylbenzo[1,2-b:4,5-b′]dithiophene (782 mg, 1.89 mmol) in dry tetrahydrofuran (36 mL) was added n-butyllithium (2.5 M in hexane, 1.66 mL, 4.15 mmol) at −78° C. After 1 hour, trimethyltin chloride (877 mg, 4.40 mmol) was added in one portion. The mixture was stirred at room temperature for 2 hours, poured into water and extracted with ether three times. The organic layer was washed with brine and dried over anhydrous MgSO4. Upon evaporating the solvent, a pale yellow oil was obtained (1.03 g, yield 74%). Upon standing for one week, yellow crystals emerged and were collected (413 mg, yield 29%). 1H NMR (CDCl3, 500 MHz) δ=7.51 (s, 2H), 3.22 (t, J=8.0 Hz, 4H), 1.76-1.89 (m, 4H), 1.45-1.54 (m, 4H), 1.22-1.45 (bs, 16H), 0.90 (t, J=7.0 Hz, 6H), 0.47 (s, 18H).

1. extractionextracted with ether three times
2. washThe organic layer was washed with brine
3. dry with materialdried over anhydrous MgSO4
4. customUpon evaporating the solvent
5. customa pale yellow oil was obtained (1.03 g, yield 74%)
6. waitUpon standing for one week
7. customwere collected (413 mg, yield 29%)