Dimethylformamide → 4-Chloro-6-methoxy-7-[2-(1,2,3-triazol-1-yl)ethoxy]quinazoline
Reaktionsgleichung
[CH3:1][O:2][C:3]1[CH:4]=[C:5]2[C:10](=[CH:11][C:12]=1[O:13][CH2:14][CH2:15][N:16]1[CH:20]=[CH:19][N:18]=[N:17]1)[N:9]=[CH:8][N:7]=[CH:6]2.CN(C=O)C.S(Cl)([Cl:28])=O>>[Cl:28][C:6]1[C:5]2[C:10](=[CH:11][C:12]([O:13][CH2:14][CH2:15][N:16]3[CH:20]=[CH:19][N:18]=[N:17]3)=[C:3]([O:2][CH3:1])[CH:4]=2)[N:9]=[CH:8][N:7]=1Komponenten
4
Reaktionsbedingungen
- Temperatur
- 80 °C
Versuchsvorschrift
A solution of 6-methoxy-7-(2-(1,2,3-triazol-1-yl)ethoxy)quinazoline (920 mg, 3.2 mmol) in thionyl chloride (10 ml) containing DMF (0.9 ml) was heated at 80° C. for 1 hour. After evaporation of the volatiles, the residue was azeotroped with toluene. The residue was partitioned between ethyl acetate and water and the aqueous layer was adjusted to pH8 with solid sodium hydrogen carbonate. The organic layer was washed with water, brine, dried (MgSO4), and the volatiles were removed by evaporation. The residue was purified by column chromatography eluting with methylene chloride/methanol (96/4) to give 4-chloro-6-methoxy-7-(2-(1,2,3-triazol-1-yl)ethoxy)quinazoline (693 mg, 71%).