反应详情

To a 2 dram vial equipped with a stir bar was added 2-(4,6-dichloropyridin-2-yl)thiazole (50 mg, 0.22 mmol), 4,4,5,5-tetramethyl-2-(4-(trifluoromethyl)phenyl)-1,3,2-dioxaborolane (59 mg, 0.22 mmol), Pd(dppf)Cl2 (8 mg, 11 μmol) and K3PO4 (344 mg, 1.62 mmol). The vial was capped with a septum screwcap and then placed under N2 atmosphere. To the vial was added THF (1 mL) and water (0.5 mL). The mixture was placed in a 60° C. heating block with stirring for 16 h. The reaction mixture was cooled to room temperatured; diluted with MeOH and then concentrated in vacuo. The resulting residue was dissolved/suspended in CH2Cl2 and then filtered through Celite. The filtrate was concentrated to afford a solid orange residue. This material was subjected to silica gel chromatography (hexanes:EtOAc, 100:0 to 95:5) to afford 2-(4-chloro-6-(4-(trifluoromethyl)phenyl)pyridin-2-yl)thiazole as a white solid (46 mg, 62%). 1H-NMR (400 MHz, CDCl3) 8.23 (d, J=1.8 Hz, 2H), 8.21 (s, 1H), 7.98 (d, J=3.3 Hz, 1H), 7.80 (d, J=1.5 Hz, 2H), 7.78 (s, 1H), 7.53 (d, J=3.3 Hz, 1H).

1. customTo a 2 dram vial equipped with a stir bar
2. customThe vial was capped with a septum screwcap
3. customwas placed in a 60° C.
4. temperatureheating block
5. temperatureThe reaction mixture was cooled to room
6. concentrationconcentrated in vacuo
7. filtrationfiltered through Celite
8. concentrationThe filtrate was concentrated
9. customto afford a solid orange residue