[Br:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[C:8](Cl)=[N:7][N:6]=[CH:5]2.[CH:13]1([NH2:19])[CH2:18][CH2:17][CH2:16][CH2:15][CH2:14]1.C(=O)([O-])[O-].[K+].[K+]>C(#N)C>[Br:1][C:2]1[CH:3]=[C:4]2[C:9](=[CH:10][CH:11]=1)[C:8]([NH:19][CH:13]1[CH2:18][CH2:17][CH2:16][CH2:15][CH2:14]1)=[N:7][N:6]=[CH:5]2A mixture of 6-bromo-I-chlorophthalazine (Example 1, 0.245 g, 1 mmol), cyclohexanamine (0.22 g, 2 mmol) and potassium carbonate (0.14 g, 1 mmol) in 5 mL acetonitrile were added to a glass microwave reaction vessel. The reaction mixture was stirred and heated in a Smith Synthesizer® microwave reactor (Personal Chemistry, Inc., Upssala, Sweden) at 180° C. for 20 min. After 20 min., all starting material was converted to product (M+1=306, 308). The mixture was concentrated under vacuum, and purified via flash chromatography (silica gel) eluting with a gradient of 2% 2 M ammonia in MeOH/DCM to 6% 2 M ammonia in MeOH/DCM to give (0.21 g) 6-bromo-N-cyclohexylphthalazin-1-amine as a yellow solid. Found MS (ES+): 306, 308(M+H)+.
Loading…
