Ethanol → 6-(((2S,4R)-1-acetyl-6-(1-(2-methoxyethyl)-1H-pyrazol-4-yl)-2-methyl-1,2,3,4-tetrahydroquinolin-4-yl)amino)nicotinonitrile

참여 물질

반응 단계

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).

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