Sodium Carbonate → 2-Chloro-3-methyl-5-(4-(trifluoromethoxy)phenyl)pyridine

関与物質

反応手順

To a solution of 1-iodo-4-(trifluoromethoxy)benzene (288 mg, 1.0 mmol) and 6-chloro-5-methylpyridin-3-ylboronic acid (223 mg, 1.3 mmol) in DMF (2 mL) was added K2CO3 (552 mg, 4.0 mmol) and H2O (0.5 mL). The reaction mixture was stirred for 5 min under an atmosphere of dry N2. Pd(PPh3)4 (10 mg, 0.009 mmol) was added, and the resulting mixture was subjected to irradiation at 120° C. for 10 min. Cooled, diluted with EtOAc (20 mL), filtered through a layer of celite, washed with 10% DMF in EtOAc (50 mL), transferred to a separation funnel, organic phase was washed with 2N Na2CO3 (20 mL, 4.00 mmol), H2O (20 mL), 30% aqueous NH4Cl (50 mL) and brine (50 mL), and dried and concentrated. The crude mixture was subjected to preparative HPLC with a gradient MeCN/H2O (5% to 98%) containing 0.1% TFA to afford 2-chloro-3-methyl-5-(4-(trifluoromethoxy)phenyl)pyridine,

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