Phosphorus oxychloride → HCID 86683182, Verbindung
Reaktionsgleichung
[CH3:1][O:2][C:3]1[CH:12]=[C:11]2[C:6]([C:7](O)=[N:8][C:9]([N:13]3[CH2:17][CH2:16][CH2:15][CH2:14]3)=[N:10]2)=[CH:5][CH:4]=1.O=P(Cl)(Cl)[Cl:21]>>[Cl:21][C:7]1[C:6]2[C:11](=[CH:12][C:3]([O:2][CH3:1])=[CH:4][CH:5]=2)[N:10]=[C:9]([N:13]2[CH2:17][CH2:16][CH2:15][CH2:14]2)[N:8]=1Komponenten
3
Versuchsvorschrift
A solution of 7-methoxy-2-(pyrrolidin-1-yl)quinazolin-4-ol (155 mg, 0.632 mmol) in POCl3 (2 ml, 21.46 mmol) was refluxed at 90° C. for 4 h. The reaction mixture was concentrated. The residue was dissolved in DCM and the pH was adjusted to 7 with 4N NaOH. The organic phase was collected and dried over sodium sulfate, filtered, then concentrated under vacuum. The crude material was purified by silica gel chromatography using 50% DCM in hexanes. The product fractions were collected and the solvent was removed under vacuum to give 4-chloro-7-methoxy-2-(pyrrolidin-1-yl)quinazoline (140 mg, 84% yield). 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 7.86 (d, J=9.0 Hz, 1H), 6.91 (d, J=2.3 Hz, 1H), 6.82 (dd, J=9.0, 2.5 Hz, 1H), 3.92 (s, 3H), 3.69 (br. s., 4H), 2.03 (t, J=6.8 Hz, 4H); MS: MS m/z 264.1 (M++1).