Dimethylamine → 5-Dimethylaminomethyl-8-hydroxy-7-methoxyquinoline

Reaktionsgleichung

[OH:1][C:2]1[C:3]([O:12][CH3:13])=[CH:4][CH:5]=[C:6]2[C:11]=1[N:10]=[CH:9][CH:8]=[CH:7]2.[CH3:14][NH:15][CH3:16].[CH2:17]=O>C(O)C>[CH3:14][N:15]([CH2:17][C:5]1[CH:4]=[C:3]([O:12][CH3:13])[C:2]([OH:1])=[C:11]2[C:6]=1[CH:7]=[CH:8][CH:9]=[N:10]2)[CH3:16]

Komponenten

Versuchsvorschrift

To a cold (0° ) solution of 8-hydroxy-7-methoxyquinoline (0.92 g, 5.25 mmol) and 26% aqueous dimethylamine (3.0 g, 17 mmol) in 10 mL of ethanol was added dropwise 37% aqueous formaldehyde (0.77 g, 9.5 mmol). After stirring at room temperature for 1 hr, the mixture was refluxed for 30 min, cooled and evaporated to dryness. The residue was diluted with water, extracted with ether and dried (MgSO4). Evaporation gave 5-dimethylaminomethyl-8-hydroxy-7-methoxyquinoline as an oil (0.85 g, 69%); structure confirmed by NMR. This oil (0.85 g, 3.6 mmol) was heated under nitrogen with 2,4-diamino-6-methylthiopyrimidine (0.57 g, 3.6 mmol) in ethylene glycol (5 mL) at 140°-165° for 45 min, then cooled. The solid that separated was collected, and washed with ethanol and ether to give 2,4-diamino-5-(8-hydroxy-7-methoxy-5-quinolylmethyl)-6-methylthiopyrimidine as a tan solid (0.47 g, 37%), structure confirmed by NMR and mass spectroscopy. A portion of this solid (0.38 g, 1.1 mmol) was used in the procedure of Example 11B to give the title compound (mp 245°-250° dec). Anal. Calcd for C17H19N5SO2.0.5H2O: C, 55.72; H, 5.50; N, 19.11; S, 8.75. Found: C, 55.71; H, 5.51; N, 19.11; S, 8.74.