反应详情

A 2.5 L Parr reaction vessel was charged with 5-fluoro-2-(1-(2-hydroxyethyl)-1H-indazol-5-yloxy)benzonitrile (25.00 g, 84.09 mmol), EtOH (8.40 mL, 0.1M), and Pearlmans catalyst (5 g, 20% weight) and purged with nitrogen. Concentrated HCl (70.08 ml, 840.9 mmol) was added to the mixture. The vessel was charged with nitrogen gas (to 30 psi×3) and hydrogen (to 50 psi×3), and the reaction was stirred at ambient temperature for 66 hours. The mixture was filtered through a Celite pad and the pad was washed with EtOH. The filtrate was concentrated under reduced pressure, and the residue was azeotroped with EtOH and toluene to provide light brown solid to provide 30.2 g (96.0%) of the title compound. 1H NMR (400 MHz, CD3OD) δ 8.07 (s, 1H), 7.72 (d, J=8.61 Hz, 1H), 7.42 (d, J=2.35 Hz, 1H), 7.33 (dd, J=3.13 Hz, 8.61 Hz, 1H), 7.29 (dd, J=2.35 Hz, 8.61 Hz, 1H), 7.12 (dt, J=3.13 Hz, 8.61 Hz, 1H), 6.83 (dd, J=4.70 Hz, 8.61 Hz, 1H), 4.54 (t, J=5.48 Hz, 2H), 4.25 (br s, 2H), 3.98 (t, J=5.48 Hz, 2H).

1. customA 2.5 L Parr reaction vessel
2. custompurged with nitrogen
3. filtrationThe mixture was filtered through a Celite pad
4. washthe pad was washed with EtOH
5. concentrationThe filtrate was concentrated under reduced pressure
6. customthe residue was azeotroped with EtOH and toluene
7. customto provide light brown solid