反应详情

温度

80 °C

Into a sealed tube were placed 4-(3-chloropyrazin-2-yloxy)aniline (1 g, 4.51 mmol), 2-(3,6-dihydro-2H-pyran-4-yl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane (1.42 g, 6.77 mmol), dichlorobis(triphenylphosphine) palladium (II) (0.25 g, 0.36 mmol), sodium carbonate (2.39 g, 22.5 mmol) and 18 mL of 4:1 DME-water. After the mixture was degassed for 5 min, the reaction was stirred at 80° C. for 18 h. The cooled reaction was diluted with CH2Cl2 and washed with aqueous saturated NaHCO3 solution; the aqueous layer was back-extracted with CH2Cl2 (1×). The organic extracts were combined, dried (MgSO4), filtered, and concentrated in vacuo. Flash column chromatography (10% to 50% EtOAc (10% MeOH)/Hexanes) afforded 4-(3-(3,6-dihydro-2H-pyran-4-yl)pyrazin-2-yloxy)aniline (1.09 g, 90% yield) as a light yellow solid. [M+1]=270.1.

1. customInto a sealed tube were placed
2. customAfter the mixture was degassed for 5 min
3. customThe cooled reaction
4. washwashed with aqueous saturated NaHCO3 solution
5. extractionthe aqueous layer was back-extracted with CH2Cl2 (1×)
6. dry with materialdried (MgSO4)
7. filtrationfiltered
8. concentrationconcentrated in vacuo