Methylamine → HCID 86680963, Verbindung
Reaktionsgleichung
[Br:1][C:2]1[N:3]=[C:4]([C:9]2[O:13][N:12]=[C:11]([C:14]3[CH:19]=[CH:18][C:17]([CH2:20]Cl)=[CH:16][CH:15]=3)[CH:10]=2)[C:5]([NH2:8])=[N:6][CH:7]=1.[CH3:22][NH2:23]>C(O)C>[Br:1][C:2]1[N:3]=[C:4]([C:9]2[O:13][N:12]=[C:11]([C:14]3[CH:19]=[CH:18][C:17]([CH2:20][NH:23][CH3:22])=[CH:16][CH:15]=3)[CH:10]=2)[C:5]([NH2:8])=[N:6][CH:7]=1Komponenten
4
Edukt 2
Produkt 1
Reagenzien, Katalysatoren, Lösungsmittel 1
Reaktionsbedingungen
- Temperatur
- 70 °C
Versuchsvorschrift
Trifluoroacetic Acid (2.500 mL) was added to a solution of tert-butyl N-[5-bromo-3-[3-[4-(chloromethyl)phenyl]isoxazol-5-yl]pyrazin-2-yl]-N-tert-butoxycarbonyl-carbamate (500 mg, 0.8836 mmol) in dichloromethane (20.00 mL) and the mixture was stirred at ambient temperature for 10 minutes. The reaction mixture was concentrated in vacuo to give 5-bromo-3-[3-[4-(chloromethyl)phenyl]isoxazol-5-yl]pyrazin-2-amine (323.1 mg, assumed 100% yield) which was used as such in next step. LC/MS m/z 365.4 [M−H]− Step 2: 5-bromo-3-[3-[4-(chloromethyl)phenyl]isoxazol-5-yl]pyrazin-2-amine was dissolved in ethanol, methanamine in ethanol (2.495 g, 3.300 mL, 26.51 mmol) was added and the mixture was stirred at 70° C. in a microwave. The reaction mixture was concentrated in vacuo. The residue was partitioned between dichloromethane and saturated aqueous sodium bicarbonate. Combined organic extract was dried (MgSO4) and concentrated in vacuo yielding 5-bromo-3-(3-(4-((methylamino)methyl)phenyl)isoxazol-5-yl)pyrazin-2-amine as an oil that was used without further purification.