反应详情

温度

90 °C

A suspension of the 6-methoxy-2-methyl-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzaldehyde produced in Example 4-1 (1.91 g, 6.92 mmol), methyl 3-(benzyloxy)-6-bromopyridine-2-carboxylate (PCT Int. Appl., 2010080478, 15 Jul. 2010) (2.23 g, 6.92 mmol), sodium carbonate (2.20 g, 20.8 mmol), and tetrakis(triphenylphosphine)palladium(0) (0.40 g, 0.35 mmol) in 1,2-dimethoxyethane (38 ml) and water (17 ml) was prepared at room temperature, and the suspension thus prepared was then stirred at 90° C. for 3 hours. After air-cooling, water was added to the reaction solution, and the mixed solution was then extracted with ethyl acetate. The organic layer thus obtained was dried over anhydrous sodium sulfate. The solvent was distilled away under reduced pressure, and the residue thus obtained was then purified by silica gel column chromatography (ethyl acetate:hexane=2:3, v/v) to obtain the title compound (3.02 g, yield: 112%).

1. customwas prepared at room temperature
2. customthe suspension thus prepared
3. temperatureAfter air-cooling
4. extractionthe mixed solution was then extracted with ethyl acetate
5. customThe organic layer thus obtained
6. dry with materialwas dried over anhydrous sodium sulfate
7. distillationThe solvent was distilled away under reduced pressure
8. customthe residue thus obtained
9. customwas then purified by silica gel column chromatography (ethyl acetate