反应详情

A 20-mL sealed tube, with stirrer bar, was charged with 4-chloro-2-(3-chlorophenyl)-6-cyclopropylpyrimidine (0.365 g, 1.38 mol), methyl 2-(4-((4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)methyl)phenyl)acetate (0.400 g, 1.38 mmol), Pd(dppf)Cl2 (0.113 g, 0.14 mmol), and powdered Na2CO3 (0.438 g, 4.14 mmol). Dioxane (6 mL) and water (3 mL) were added. The resulting mixture was stirred under Ar at 90° C. for 1.5 h until the starting chloride was consumed. After cooling to room temperature, the reaction mixture was filtered through celite washing with ethyl acetate until the filtrate was colorless. The aqueous layer was separated and the organic layer was washed with saturated sodium chloride (2×5 mL) then dried over sodium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by chromatography on silica using hexane/ethyl acetate (95:5 to 1:2) as eluent to afford the title compound (0.285 g, 52%) as a colorless oil. MW=392.88. 1H NMR (DMSO-d6, 500 MHz) δ 8.30-8.27 (m, 2H), 7.59-7.51 (m, 2H), 7.31 (d, J=8.0 Hz, 2H), 7.28 (s, 1H), 7.21 (d, J=8.0 Hz, 2H), 4.07 (s, 2H), 3.64 (s, 2H), 3.59 (s, 3H), 2.16-2.09 (m, 1H), 1.16-1.05 (m, 4H); ESI MS m/z 393 [M+H]+.

1. customA 20-mL sealed tube
2. customwas consumed
3. filtrationthe reaction mixture was filtered
4. washthrough celite washing with ethyl acetate until the filtrate
5. customThe aqueous layer was separated
6. washthe organic layer was washed with saturated sodium chloride (2×5 mL)
7. dry with materialthen dried over sodium sulfate
8. filtrationfiltered
9. concentrationconcentrated under reduced pressure
10. customThe residue was purified by chromatography on silica