反应详情

温度

95 °C

2-Chloro-5-fluoroquinolin-6-ol (Intermediate 16, 1.0 mmol) and 4-borono-3-chlorobenzoic acid (1.1 mmol) were mixed with 5% (Ph3P)4Pd and 4.0 mmol of NaHCO3 in 20 ml 50% dioxane/water. The mixture was degassed three times by evacuation and argon filling and heated at 95° C. overnight. The reaction was diluted with 20 ml of water and filtered. The filtrate was acidified with 1N HCl to pH=4. The precipitate was filtered and washed with water, dried. The crude was purified by column using AcOH/MeOH/EtOAC (1/5/94) as solvent B and hexanes as solvent A with gradient 2 to 100%. The fractions with compound were pooled and evaporated to obtain white solid. The solid was triturated with diisopropyl ether. 50 mg of final product was obtained. 1H-NMR (DMSO-d6, 300 MHz, TMS): δ 10.55 (b, 1H), 8.47 (d, 1H), 8.01-8.03 (m, 2H), 7.79 (m, 3H), 7.56 (t, 1H). MS (ESI): m/z=316.3 [M−1]−.

1. customThe mixture was degassed three times by evacuation and argon filling
2. additionThe reaction was diluted with 20 ml of water
3. filtrationfiltered
4. filtrationThe precipitate was filtered
5. washwashed with water
6. customdried
7. customThe crude was purified by column
8. customevaporated
9. customto obtain white solid
10. customThe solid was triturated with diisopropyl ether