反应详情

温度

65 °C

A mixture of 3-(2-fluoro-4-iodo-phenylamino)-1-methyl-1H-pyrrolo[3,2-c]pyridine-2-carboxylic acid ethyl ester (90 mg, 0.21 mmol), 1N aqueous NaOH solution (0.22 ml, 0.22 mmol) and ethanol (3 ml) were heated at 65° C. for 2.5 hours. The reaction mixture was concentrated and then azeotroped with toluene (2×5 ml) to give a solid residue. The solid residue was dissolved in anhydrous THF (5 ml) and O—((R)-2,2-dimethyl-[1,3]dioxolan-4-ylmethyl)hydroxylamine (49 mg, 0.41 mmol), EDCI (49 mg, 0.26 mmol), HOBt (39 mg, 0.29 mmol) and DIPEA (109 μl, 0.62 mmol) were added. After stirring for 19 hours the solvent was evaporated and the residue was partitioned between ethyl acetate (30 ml) and water (20 ml). The organic layer was isolated, dried over sodium sulphate then filtered and evaporated to give a yellow oil. The oil was purified by flash chromatography (Si-PPC, pentane:ethyl acetate, gradient 50:50 to 0:100) to afford the title compound as a yellow solid (71 mg, 65%). LCMS (method B): RT=2.87 min, M+H+=542.

1. concentrationThe reaction mixture was concentrated
2. customazeotroped with toluene (2×5 ml)
3. customto give a solid residue
4. customwas evaporated
5. customthe residue was partitioned between ethyl acetate (30 ml) and water (20 ml)
6. customThe organic layer was isolated
7. dry with materialdried over sodium sulphate
8. filtrationthen filtered
9. customevaporated
10. customto give a yellow oil
11. customThe oil was purified by flash chromatography (Si-PPC, pentane:ethyl acetate, gradient 50:50 to 0:100)