Phosphorus oxychloride → 4-(1-Chloro-6-methoxyisoquinolin-3-yl)morpholine
Reaktionsgleichung
[CH3:1][O:2][C:3]1[CH:4]=[C:5]2[C:10](=[CH:11][CH:12]=1)[C:9](O)=[N:8][C:7]([N:14]1[CH2:19][CH2:18][O:17][CH2:16][CH2:15]1)=[CH:6]2.O=P(Cl)(Cl)[Cl:22]>>[Cl:22][C:9]1[C:10]2[C:5](=[CH:4][C:3]([O:2][CH3:1])=[CH:12][CH:11]=2)[CH:6]=[C:7]([N:14]2[CH2:19][CH2:18][O:17][CH2:16][CH2:15]2)[N:8]=1Komponenten
3
Versuchsvorschrift
A solution of 6-methoxy-3-morpholinoisoquinolin-1-ol (315 mg, 1.210 mmol) in POCl3 (1692 μl, 18.15 mmol) was refluxed 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 as eluent. The product fractions were collected and the solvent removed under vacuum to give 4-(1-chloro-6-methoxyisoquinolin-3-yl)morpholine (323 mg, 95% yield). 1H NMR (400 MHz, CHLOROFORM-d) δ ppm 8.01 (d, J=9.3 Hz, 1H), 6.97 (dd, J=9.3, 2.5 Hz, 1H), 6.86 (d, J=2.5 Hz, 1H), 6.59 (s, 1H), 3.92 (s, 3H), 3.90-3.85 (m, 4H), 3.56-3.50 (m, 4H); MS: MS m/z 279.1 (M++1).