反应详情

温度

-78 °C

In THF, 8.48 g (9.90 mmols) of 3-(dibutoxyphosphoryl)-2,5-bis(tributylstannyl)thiophene was dissolved and cooled down to −78° C. Commercially available n-butyl lithium (1.59 M hexane solution, 10.9 mmols) was slowly dropped, followed by stirring for 1 hour at a standing temperature. Thereafter, a disodium hydrogen phosphate/sodium dihydrogen phosphate buffer solution, adjusted to pH=7, was added, followed by extraction with ethyl acetate. The organic phase was washed with a saturated saline solution and dried over anhydrous sodium sulfate. The solvent was removed by distilling off under reduced pressure, and the resulting crude product was purified with a silica gel column (gradiated from ethyl acetate:hexane=1:10 with ethyl acetate:hexane=1:2) to obtain the specified substance in the form of a transparent oil at a yield of 4.64 g (yield: 83%). The thus obtained substance was used as it is for reaction in Example 12(18).

1. additionwas added
2. extractionfollowed by extraction with ethyl acetate
3. washThe organic phase was washed with a saturated saline solution
4. dry with materialdried over anhydrous sodium sulfate
5. customThe solvent was removed
6. distillationby distilling off under reduced pressure
7. customthe resulting crude product was purified with a silica gel column (gradiated from ethyl acetate:hexane=1:10 with ethyl acetate:hexane=1:2)
8. customto obtain the specified substance in the form of a transparent oil at a yield of 4.64 g (yield: 83%)
9. customis for reaction in Example 12(18)