反应详情
EQUATION
反应方程式
REACTANTS
反应物
PRODUCTS
生成物
AUXILIARIES
试剂、催化剂与溶剂
PROCEDURE
实验过程
In a dry flask, allylpalladium(II) chloride dimer (1.333 g, 3.64 mmol) and butyldiadamantylphosphine (5.23 g, 14.57 mmol) were taken-up in degassed dimethylacetamide (50 mL). The vessel was evacuated and backfilled with argon (3 times), and then stirred at rt for 10 minutes. Additional degassed dimethylacetamide (50 mL), 6-bromo-4-methyl-N-[4-(trifluoromethyl)pyridin-2-yl]pyridin-2-amine (12.1 g, 36.4 mmol), thiazole (10.36 mL, 146 mmol), potassium carbonate (15.11 g, 109 mmol), and pivalic acid (6.34 mL, 54.6 mmol) were added. The vessel was evacuated and backfilled with argon (3 times) and stirred under argon at 130° C. overnight. The reaction mixture was then diluted with EtOAc (500 mL), cooled to rt, filtered through Celite®, and concentrated. Water was added to the crude product mixture and the resulting precipitate was collected via filtration and subjected to silica gel flash chromatography (ethyl acetate-hexanes). Purification yielded 4-methyl-6-(1,3-thiazol-5-yl)-N-[4-(trifluoromethyl)pyridin-2-yl]pyridin-2-amine (5.29 g, 15.72 mmol, 43% yield) as a yellow solid. MS ESI calcd for C15H11F3N4S [M+H]+ 337, found 337. 1H NMR (600 MHz, DMSO) δ 10.21 (s, 1H), 9.14 (s, 1H), 8.59 (s, 1H), 8.52 (s, 1H), 8.47 (d, J=5.1 Hz, 1H), 7.43 (s, 1H), 7.20 (d, J=5.1 Hz, 1H), 7.11 (s, 1H), 2.30 (s, 3H) ppm.
WORKUP
后处理
- customThe vessel was evacuated
- additionwere added
- customThe vessel was evacuated
- stirringstirred under argon at 130° C. overnight
- additionThe reaction mixture was then diluted with EtOAc (500 mL)
- temperaturecooled to rt
- filtrationfiltered through Celite®
- concentrationconcentrated
- additionWater was added to the crude product mixture
- filtrationthe resulting precipitate was collected via filtration
- customPurification