反应详情

N-[[2-(4-chlorophenyl)-4-methylthiazol-5-yl]methyl]piperidine-3-carboxamide hydrochloride (123 mg, 0.318 mmol) was suspended in diethyl ether. The suspension washed sequentially with a 0.1 mol/L aqueous sodium hydroxide solution and brine and was dried over magnesium sulfate. The solvent was then evaporated and the resulting residue was dissolved in dichloromethane (10 mL). To this solution, 3-(methoxycarbonyl)phenylboric acid (114 mg, 0.636 mmol), molecular sieves 4 Å (300 mg), copper (II) acetate (122 mg, 0.636 mmol) and triethylamine (0.222 mL, 1.59 mmol) were added and the mixture was stirred at room temperature for 16 hours. Subsequently, the reaction mixture was filtered through Celite and a saturated aqueous sodium bicarbonate solution was added to the filtrate. The mixture was extracted with ethyl acetate. The extract washed with brine, followed by drying over magnesium sulfate and evaporation of the solvent. Purification of the resulting residue by silica gel column chromatography (hexane:ethyl acetate=2:1->0:1) gave 20.1 mg (13%) of the desired compound as a colorless powder.

1. washThe suspension washed sequentially with a 0.1 mol/L aqueous sodium hydroxide solution and brine
2. dry with materialwas dried over magnesium sulfate
3. customThe solvent was then evaporated
4. dissolutionthe resulting residue was dissolved in dichloromethane (10 mL)
5. filtrationSubsequently, the reaction mixture was filtered through Celite
6. additiona saturated aqueous sodium bicarbonate solution was added to the filtrate
7. extractionThe mixture was extracted with ethyl acetate
8. washThe extract washed with brine
9. dry with materialby drying over magnesium sulfate and evaporation of the solvent
10. customPurification of the resulting residue by silica gel column chromatography (hexane:ethyl acetate=2:1->0:1)