反应详情

温度

120 °C

To a mixture of (S)-tert-butyl ((3-bromopyridin-2-yl)(4-(trifluoromethyl)-phenyl)methyl)carbamate (0.4 g, 0.93 mmol) in water (2 mL) and EtOH (8 mL) were added K3PO4 (0.3 g, 1.3 mmol), vinyl boronic acid (4 mL, 9.3 mmol) and A−taPhos)2PdCl2 (Guram, A. S. et al. Org. Lett. 2006, 8, 1787; 0.13 g, 0.01 mmol). The resulting mixture was stirred at 120° C. for 1 h. Reaction progress was monitored by TLC (20% EtOAc in petroleum ether). After completion of reaction, water (50 mL) was added to the reaction mixture, and the product was extracted with DCM (3×25 mL). The combined organic layers were separated, dried over anhydrous sodium sulfate, and purified by column chromatography using silica (100-200 mesh) and using 15-30% EtOAc in petroleum ether as an eluent. In this manner, (S)-tert-butyl ((4-(trifluoromethyl)phenyl)(3-vinylpyridin-2-yl)methyl)carbamate was obtained as an off-white solid. MS (ESI pos. ion) m/z: 378.9 (M+1).

1. customReaction progress
2. additionwas added to the reaction mixture
3. extractionthe product was extracted with DCM (3×25 mL)
4. customThe combined organic layers were separated
5. dry with materialdried over anhydrous sodium sulfate
6. custompurified by column chromatography