反应详情

温度

0 °C

6-(3-ethylureido)-4-(4-(trifluoromethyl)thiazol-2-yl)pyridin-3-ylboronic acid (Intermediate 17, 0.261 g, 0.72 mmol, Intermediate 17) and 2-fluoro-5-iodobenzoic acid (0.175 g, 0.66 mmol, aldrich) were combined in dioxane (1 ml). A solution of cesium carbonate (0.364 g, 1.12 mmol) in water (0.658 ml) was added followed by tetrakis(triphenylphosine)palladium(0) (0.076 g, 0.07 mmol, strem) and additional dioxane (2.63 ml). The flask was placed in an oil bath preheated to 100° C. and was heated for 1h., then cooled to 0° C. and 1 N HCl was added until the pH was ˜3. EtOAc (5 ml) was added and a solid crashed out and was collected by filtration and washed with EtOAc, then dried to give a grey solid 5-(6-(3-ethylureido)-4-(4-(trifluoromethyl)thiazol-2-yl)pyridin-3-yl)-2-fluorobenzoic acid (0.180 g, 60.2%).

1. customThe flask was placed in an oil bath
2. custompreheated to 100° C.
3. temperaturewas heated for 1h.
4. filtrationwas collected by filtration
5. washwashed with EtOAc
6. customdried