反应详情

温度

90 °C

To a solution of 5-(4,4,5,5-Tetramethyl-[1,3,2]dioxaborolan-2-yl) -pyridine-2-carbonitrile (0.5 g, 2.17 mmol) in dimethoxyethane (10 mL) and water (3 mL) is added (1R,2S)-2-Amino-3-fluoro-1-(4-iodo-phenyl)-propan-1-ol (0.65 g, 2.20 mmol) and Cs2CO3 (2.15 g, 6.59 mmol), and degassed with nitrogen followed by addition of Pd(PPh3)4 (0.25 g, 0.21 mmol) and heated the reaction mixture to 90° C. for 1.5 hours. Solvent is evaporated in vacuo, to get crude material purified by column chromatography eluting in 2.5 to 3% methanol in CH2Cl2 to afford the title compound (0.3 g) as impure. 1H NMR (400 MHz, DMSO-d6) δ: 3.09-3.18 (m, 1H), 3.48 (s, 1H), 4.24-4.28 (m, 0.5H), 4.36-4.41 (m, 1H), 4.49-4.52 (m, 0.5H), 4.64 (d, J=6.16 Hz, 1H), 7.53 (d, J=8.16 Hz, 2H), 7.59 (d, J=8.24 Hz, 2H), 7.76 (d, J=8.2, 1H), 8.0 (dd, J1=8.16 Hz, J2=2.32 Hz, 1H), 8.93 (d, J=1.76 Hz, 1H). LC-MS (m/z): [M+H]=272.00.

1. customdegassed with nitrogen
2. customSolvent is evaporated in vacuo
3. customto get crude material
4. custompurified by column chromatography
5. washeluting in 2.5 to 3% methanol in CH2Cl2