反应详情

Under N2, a mixture of 0.313g (1.0 mmol) of 2-(3,4-dichlorophenoxy)-5-fluoro-N-methyl benzamide in 5.0 mL of anhydrous tetrahydrofuran (THF) was treated via syringe with 4.0 mL (4.0 mmol) of 1.0 M BH3 in THF (Aldrich Chem. Co.). and the mixture was heated to reflux for a total of 48 hr. The reaction was quenched by the addition of 25 mL of 6N HCl and heating to reflux until the free amine could be detected by tic (CHCl3:CH3OH:TEA, (95:5:1)). The cooled mixture was then diluted with water, basified with K2CO3and extracted with EtOAc. The combined organic layers were washed with water and saturated NaCl, then dried with MgSO4, filtered and concentrated in vacuo to the free base as a light brown oil, 0.164 g, 54%). This compound was converted to the hydrochloride salt as described previously, m.p. 200–202°.

1. additionwas treated via syringe with 4.0 mL (4.0 mmol) of 1.0 M
2. temperatureand the mixture was heated
3. temperatureto reflux for a total of 48 hr
4. customThe reaction was quenched by the addition of 25 mL of 6N HCl
5. temperatureheating
6. temperatureto reflux until the free amine
7. additionThe cooled mixture was then diluted with water
8. extractionextracted with EtOAc
9. washThe combined organic layers were washed with water and saturated NaCl
10. dry with materialdried with MgSO4
11. filtrationfiltered
12. concentrationconcentrated in vacuo to the free base as a light brown oil, 0.164 g, 54%)