64% |
With dichloro[1,1'-bis(di-t-butylphosphino)ferrocene]palladium(II); sodium carbonate; In tetrahydrofuran; water; at 80.0℃; for 5.16667h;Inert atmosphere; |
Synthesis of 3-fluoro-2-(pyrimidin-2-yl)benzonitrile (Intermediate in the synthesis of intermediate A-2) To a solution of <strong>[624741-47-5]3-fluoro-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzonitrile</strong> (4.98 g, 19.1 mmol) and 2-bromopyridine (3.85 g, 23 mmol) in THF (96 mL) was added Na2CO3 (6 g, 57.4 mmol) followed by water (43 mL). The reaction mixture was degassed with N2 for 10 minutes. PdCl2(dtbpf) (374 mg, 0.57 mmol) was added and the reaction mixture was stirred at 80 C. for 5 h. The solution was cooled to room temperature and a mixture of EtOAc and water was added. The aqueous was extracted twice with EtOAc and the combined organic layers were dried over MgSO4, filtered and evaporated. The title compound was precipitated by dissolving the residue in a minimum amount of EtOAc and then adding hexanes. The solid was filtered, washed with hexanes and dried to afford the title compound (2.46 g, 64%). MS (ESI) mass calcd. for C11H6FN3, 199.1; m/z found 200.1 [M+H]+. 1H NMR (400 MHz, Chloroform-d) delta 9.02-8.91 (m, 2H), 7.65 (dt, J=7.7, 1.0 Hz, 1H), 7.60-7.52 (m, 1H), 7.51-7.43 (m, 1H), 7.41 (t, J=4.9 Hz, 1H). |
64% |
With dichloro[1,1?-bis[bis(1,1-dimethylethyl)phosphino]ferrocene-P,P?]palladium; sodium carbonate; In tetrahydrofuran; water; at 80.0℃; for 5.0h;Inert atmosphere; |
10286] To a solution of 3-fluoro-2-(4,4,5,5-tetramethyl-1, 3,2-dioxaborolan-2-yl)benzonitrile (4.98 g, 19.1 mmol) and2-bromopyrimidine (3.85 g, 23 mmol) in THF (96 mE) was added Na2CO3 (6 g, 57.4 mmol) followed by water (43 mE). The reaction mixture was degassed with N2 for 10 minutes. PdC12(dtbpf) (374 g, 0.57 mmol) was added and the reaction mixture was stirred at 800 C. for 5 h. The solution was cooled to room temperature and a mixture of EtOAc and water was added. The aqueous was extracted twice with EtOAc and the combined organic layers were dried over Mg504, filtered and evaporated. The title compound was precipitated by dissolving the residue in a minimum amount of EtOAc and then adding hexanes. The solid was filtered, washed with hexanes and dried to afford the title compound (2.46 g, 64%). MS (ESI) mass calcd. for C,,H6FN3, 199.1; mlz found 200.1 [M+H]. ?H NMR (400 MHz, Chloroform-d) oe 9.02-8.91 (m, 2H), 7.65 (dt, J7.7, 1.0 Hz, 1H), 7.60-7.52 (m, 1H), 7.5 1-7.43 (m, 1H), 7.41 (t, J4.9 Hz, 1H). |
64% |
With dichloro[1,1'-bis(di-t-butylphosphino)ferrocene]palladium(II); sodium carbonate; In tetrahydrofuran; water; at 80.0℃; for 5.0h; |
Synthesis of 3-fluoro-2-(pyrimidin-2-yl)benzonitrile (Intermediate in the synthesis of intermediate A-2) To a solution of <strong>[624741-47-5]3-fluoro-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzonitrile</strong> (4.98 g, 19.1 mmol) and 2-bromopyrimidine (3.85 g, 23 mmol) in THF (96 mL) was added Na2CO3 (6 g, 57.4 mmol) followed by water (43 mL). The reaction mixture was degassed with N2 for 10 minutes. PdCl2(dtbpf) (374 mg, 0.57 mmol) was added and the reaction mixture was stirred at 80 C. for 5 h. The solution was cooled to room temperature and a mixture of EtOAc and water was added. The aqueous was extracted twice with EtOAc and the combined organic layers were dried over MgSO4, filtered and evaporated. The title compound was precipitated by dissolving the residue in a minimum amount of EtOAc and then adding hexanes. The solid was filtered, washed with hexanes and dried to afford the title compound (2.46 g, 64%). MS (ESI) mass calcd. for C11H6FN3, 199.1. m/z found 200.1 [M+H]+. 1H NMR (400 MHz, Chloroform-d) delta 9.02-8.91 (m, 2H), 7.65 (dt, J=7.7, 1.0 Hz, 1H), 7.60-7.52 (m, 1H), 7.51-7.43 (m, 1H), 7.41 (t, J=4.9 Hz, 1H). |