反应详情

To a solution of 2,4,6-trichloro-1,3,5-triazine (8 g) in acetone (250 mL) was added a solution of 2,2,2-trifluoroethanol (4.77 g) and 2,4,6-Collidine (6.31 mL) in acetone (100 mL) dropwise over 20 minutes. The resulting mixture was stirred at room temperature for 16 hours. All the solvents were removed under vacuum to give a residue which was diluted with NMP (100 mL), followed by addition of tert-butyl 4-aminobenzoate (9.22 g) and DIPEA (22.73 mL). After stirring at room temperature for 16 hours, 4-(aminomethyl)phenol (5.88 g) was added. The resulting mixture was stirred for 2 days at room temperature. Then, the mixture was diluted with 300 mL of water and extracted with EtOAc (2×300 mL). The organic layers were combined, washed with brine (2×150 mL), dried over MgSO4 and concentrated. The residue was purified by silica gel column (hexane:EtOAc=3:2) to give tert-butyl 4-(4-(4-hydroxybenzylamino)-6-(2,2,2-trifluoroethoxy)-1,3,5-triazin-2-ylamino)benzoate (12 g).

1. customAll the solvents were removed under vacuum
2. customto give a residue which
3. stirringAfter stirring at room temperature for 16 hours
4. stirringThe resulting mixture was stirred for 2 days at room temperature
5. extractionextracted with EtOAc (2×300 mL)
6. washwashed with brine (2×150 mL)
7. dry with materialdried over MgSO4
8. concentrationconcentrated
9. customThe residue was purified by silica gel column (hexane:EtOAc=3:2)