反应详情

Sodium hydroxide (22.5 g, 0.56 mol) in water (100 ml) was added to the amine from example 26 (26.0 g, 0.09 mol) in dichloromethane (400 ml) and the solution vigorously stirred at room temperature. Chloroacetylchloride (8.6 ml, 0.11 mol) was then added and the reaction mixture stirred for a further 60 minutes. The layers were separated and the aqueous layer re-extracted with dichloromethane (200 ml). The organic extracts were combined, dried over anhydrous magnesium sulphate, filtered and concentrated in vacuo to give a colourless oil. Potassium hydroxide (15.0 g, 0.27 mol), isopropyl alcohol (400 ml) and the colourless oil residue were stirred together as an opaque solution with water (30 ml) for 2 hours. The reaction mixture was concentrated in vacuo and the yellow residue dissolved in ethyl acetate (200 ml). This was partitioned with water (200ml) then brine (200 ml). The organic fraction was dried over anhydrous magnesium sulphate, filtered and concentrated in vacuo to give the title compound as a white solid (19.9 g, 0.06 mol, 67%). 1H NMR (CDCl3, 400 MHz) δ: 0.95 (t, 3H), 1.62 (m, 2H), 3.34 (m, 2H), 3.51 (m, 2H), 4.32 (d, 1H), 4.41 (d, 1H), 4.72 (dd, 1H), 5.04 (s, 2H), 6.98 (d, 2H), 7.31-7.43 (m, 7H). LRMS: m/z 326 (M−H+).

1. stirringthe reaction mixture stirred for a further 60 minutes
2. customThe layers were separated
3. extractionthe aqueous layer re-extracted with dichloromethane (200 ml)
4. dry with materialdried over anhydrous magnesium sulphate
5. filtrationfiltered
6. concentrationconcentrated in vacuo
7. customto give a colourless oil
8. concentrationThe reaction mixture was concentrated in vacuo
9. dissolutionthe yellow residue dissolved in ethyl acetate (200 ml)
10. customThis was partitioned with water (200ml)
11. dry with materialThe organic fraction was dried over anhydrous magnesium sulphate
12. filtrationfiltered
13. concentrationconcentrated in vacuo