反应详情

温度

-78 °C

In THF, 1.96 g (8.90 mmols) of 3-(diethoxyphosphoryl)thiophene was dissolved and cooled down to −78° C. Commercially available n-butyl lithium (1.59 M hexane solution, 8.90 mmols) was slowly dropped, followed by stirring for 3 hours at a standing temperature. Thereafter, 3.19 g (9.80 mmols) of commercially available tributylstannyl chloride was dropped and stirred for 1.5 hours. After completion of the reaction, a disodium hydrogen phosphate/sodium dihydrogen phosphate buffer solution, adjusted to pH=7, was added so as to complete the reaction, 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, and the resulting crude product was purified with a silica gel column (ethyl acetate:hexane=1:2) to obtain the specified substance in the form of a transparent oil at a yield of 4.35 g (yield: 96%). The thus obtained substance was used as it is for reaction in Example 12(3).

1. stirringstirred for 1.5 hours
2. customAfter completion of the reaction
3. additionwas added so as
4. customthe reaction
5. extractionfollowed by extraction with ethyl acetate
6. washThe organic phase was washed with a saturated saline solution
7. dry with materialdried over anhydrous sodium sulfate
8. customThe solvent was removed
9. customthe resulting crude product was purified with a silica gel column (ethyl acetate:hexane=1:2)
10. customto obtain the specified substance in the form of a transparent oil at a yield of 4.35 g (yield: 96%)
11. customis for reaction in Example 12(3)