反应详情

A mixture of (S)-ethyl 2-(5-bromo-4-(4,4-dimethylpiperidin-1-yl)-2,6-dimethylpyridin-3-yl)-2-(tert-butoxy)acetate (0.0553 g, 0.121 mmol), (6-(benzyloxy)pyridin-3-yl)boronic acid (0.042 g, 0.182 mmol) and 2M Na2CO3 (0.152 ml, 0.304 mmol) in DMF (2 mL) was degassed for 10 min. Then, Pd(Ph3P)4 (0.014 g, 0.012 mmol) added, degassed for 5 min and placed in a pre-heated oil bath at 110° C. After 2 h, cooled and purified by prep-HPLC to afford (S)-ethyl 2-(6′-(benzyloxy)-4-(4,4-dimethylpiperidin-1-yl)-2,6-dimethyl-[3,3′-bipyridin]-5-yl)-2-(tert-butoxy)acetate (0.016 g, 0.029 mmol, 23.54% yield) as white solid. 1H NMR (500 MHz, CDCl3) δ 8.08-8.10 (m, 0.5H), 8.00 (d, J=1.9 Hz, 0.5H), 7.51-7.54 (m, 2.5H), 7.39-7.44 (m, 2.5H), 7.34-7.38 (m, 1H), 6.92-6.96 (m, 1H), 6.05 (s, 1H), 5.41-5.55 (m, 2H), 4.23-4.30 (m, 1H), 4.15-4.22 (m, 1H), 3.26 (d, J=12.3 Hz, 0.5H), 3.19 (d, J=11.5 Hz, 0.5H), 2.87-2.96 (m, 0.5H), 2.75-2.83 (m, 0.5H), 2.63 (s, 1.5H), 2.62 (s, 1.5H), 2.38 (d, J=11.2 Hz, 0.5H), 2.26-2.31 (m, 0.5H), 2.25 (s, 1.5H), 2.23 (s, 1.5H), 2.05-2.18 (m, 1H), 1.50-1.57 (m, 1H), 1.35-1.44 (m, 1H), 1.27 (dt, J=2.2, 7.1 Hz, 3H), 1.22 (s, 4.5H), 1.21 (s, 4.5H), 1.06-1.16 (m, 2H), 0.92 (s, 3H), 0.67 (br. s., 3H). LCMS (M+H)=560.4.

1. customwas degassed for 10 min
2. customdegassed for 5 min
3. customplaced in a pre-heated oil bath at 110° C
4. temperaturecooled
5. custompurified by prep-HPLC