反应详情

温度

130 °C

A mixture of tert-butyl 4-(5-(4-(butyloxycarbonylaminomethyl)piperidin-1-yl)-1-methyl-1H-pyrazol-4-ylcarbamoyl)-2-bromothiazol-5-ylcarbamate (0.203 g, 0.33 mmol), Na2CO3 (70 mg, 0.66 mmol) and trans-(2-cyclohexylvinyl)boronic acid (0.102 g, 0.66 mmol) in DME (1.5 mL) and water (0.5 mL) was degassed by gently bubbling nitrogen through the mixture for 15 min. [1,1′-Bis(diphenylphosphino)ferrocene]dichloro-palladium(II) (27 mg, 0.033 mmol) was then added and the mixture degassed for a further 10 min before being heated in a microwave at 130° C. for 45 min. The reaction mixture was diluted with water and extracted with EtOAc. The combined organic extracts were passed through a phase separator cartridge and concentrated under reduced pressure. The residue was purified via silica gel column chromatography (0-100% EtOAc/isohexane) to afford (E)-tert-butyl 4-(5-(4-(butyloxycarbonylaminomethyl)piperidin-1-yl)-1-methyl-1H-pyrazol-4-ylcarbamoyl)-2-(2-cyclohexylvinyl)thiazol-5-ylcarbamate as a brown gum (0.144 g, 68%). A solution of this gum (0.142 g, 0.22 mmol) in MeOH (5 mL) and acetic acid (0.5 mL) was passed through the H-Cube® (70 bar, 70° C., flow rate: 1 mL/min, 30 mm 10% Pd/C cartridge). The solvent was removed under reduced pressure to afford crude tert-butyl 4-(5-(4-(butyloxycarbonylaminomethyl)piperidin-1-yl)-1-methyl-1H-pyrazol-4-ylcarbamoyl)-2-(2-cyclohexylethyl)thiazol-5-ylcarbamate as a clear gum (0.122 g, 99%). This gum (0.122 g, 0.188 mmol) was stirred in HCl in 1,4-dioxane (4.0 M, 2 mL) at room temperature for 18 hr. The solvents were removed under reduced pressure and the crude residue was re-dissolved in MeOH and loaded onto an SCX column. The column was washed with MeOH and 7 N ammonia in MeOH to yield 281 as a pink solid (39 mg, 63%). 1H NMR (400 MHz, d4-MeOD) δ 7.43 (s, 1H), 3.71 (s, 3H), 3.21-3.06 (m, 4H), 2.86 (t, J=7.8 Hz, 2H), 2.62 (d, J=6.6 Hz, 2H), 1.87-1.59 (m, 9H), 1.58-1.45 (m, 1H), 1.43-1.15 (m, 6H), 0.99 (q, J=11.9 Hz, 2H). LCMS (ES+) m/z 446 (M+1)

1. additionwas then added
2. customthe mixture degassed for a further 10 min
3. additionThe reaction mixture was diluted with water
4. extractionextracted with EtOAc
5. concentrationconcentrated under reduced pressure
6. customThe residue was purified via silica gel column chromatography (0-100% EtOAc/isohexane)