反应详情

To a solution of 6-(4-(imidazo[1,2-a]pyrazin-3-yl)-2-methoxyphenyl)-N-methyl-N-(2,2,6,6-tetramethylpiperidin-4-yl)pyridazin-3-amine (Example 42-3, 50 mg, 0.1 mmol) in DCM (2 mL) was added 1 M solution of BBr3 in DCM (0.52 mL) dropwise at 78° C. The crude reaction mixture was warmed to RT and stirred overnight. The reaction was quenched with NaHCO3 aq solution at 0° C. and extracted with DCM. The organic layer was dried over Na2SO4, filtered and concentrated to give the crude product. The crude product was acidified to pH 3 using 1N HCl and purified by catch and release using SiliaBond Propylsulfonic Acid® (1 g, MeOH as eluent and a 2 N ammonia solution in MeOH to release the material). After evaporation, the material was purified via reverse phase HPLC to afford 2-(6-(methyl(2,2,6,6-tetramethylpiperidin-4-yl)amino)pyridazin-3-yl)-5-(5,6,7,8-tetrahydroimidazo[1,2-a]pyrazin-3-yl)phenol (4 mg). MS: 462.4 [M+H+]; LCMS Rt=0.36 min [Method Q]; 1H NMR (400 MHz, METHANOL-d4) δ ppm 8.03 (d, J=10.11 Hz, 1H), 7.74 (d, J=9.09 Hz, 1H), 7.22 (d, J=10.11 Hz, 1H), 6.96 (s, 2H), 6.99 (s, 1H), 5.02 (br. s., 1H), 3.88-4.09 (m, 4H), 3.11 (t, J=5.31 Hz, 2H), 2.92 (s, 3H), 1.62 (d, J=12.63 Hz, 2H), 1.51 (t, J=12.38 Hz, 2H), 1.31 (s, 6H), 1.16 (s, 6H).

1. customThe crude reaction mixture
2. customThe reaction was quenched with NaHCO3 aq solution at 0° C.
3. extractionextracted with DCM
4. dry with materialThe organic layer was dried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated
7. customto give the crude product
8. custompurified by catch and release
9. customAfter evaporation
10. customthe material was purified via reverse phase HPLC