反应详情

6-(((2S,4R)-1-acetyl-6-bromo-2-methyl-1,2,3,4-tetrahydroquinolin-4-yl)amino)nicotinonitrile (Intermediate 6) (10 g, 26.0 mmol), PEPPSI™ (1.764 g, 2.60 mmol), KOH (4.37 g, 78 mmol) and 1-(2-methoxyethyl)-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (CAS No. 847818-71-7 available from Milestone PharmTech USA Inc.) (11.78 g, 46.7 mmol) were combined in a mixture of toluene (80 mL), EtOH (40 mL) and water (50 mL). The mixture was degassed and then heated at reflux under a nitrogen atmosphere for 6 h. The solution was cooled, diluted with EtOAc (200 mL) and washed with water (200 mL). The organic layer was dried over sodium sulphate and concentrated in vacuo to give a pale yellow gum. This yellow gum was purified by silica gel column chromatography (330 g column, eluting with 0-100% EtOAC/cyclohexane followed by 10% MeOH/EtOAc). The appropriate fractions were collected and the solvent evaporated in vacuo to give the crude product which was further purified by preparative HPLC (Method HpH) and then dried overnight in a vacuum oven at 55° C. to give 6-(((2S,4R)-1-acetyl-6-(1-(2-methoxyethyl)-1H-pyrazol-4-yl)-2-methyl-1,2,3,4-tetrahydroquinolin-4-yl)amino)nicotinonitrile (4.62 g).

1. customThe mixture was degassed
2. temperatureheated
3. temperatureat reflux under a nitrogen atmosphere for 6 h
4. temperatureThe solution was cooled
5. additiondiluted with EtOAc (200 mL)
6. washwashed with water (200 mL)
7. dry with materialThe organic layer was dried over sodium sulphate
8. concentrationconcentrated in vacuo
9. customto give a pale yellow gum
10. customThis yellow gum was purified by silica gel column chromatography (330 g column, eluting with 0-100% EtOAC/cyclohexane followed by 10% MeOH/EtOAc)
11. customThe appropriate fractions were collected
12. customthe solvent evaporated in vacuo
13. customto give the crude product which
14. customwas further purified by preparative HPLC (Method HpH)
15. customdried overnight in a vacuum oven at 55° C.