Sodium Hydroxide → HCID 21883490, compound
Reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([C:21]2[CH:26]=[CH:25][CH:24]=[C:23]([O:27][CH3:28])[CH:22]=2)[C:5]2[O:10][CH:9]([C:11]([F:14])([F:13])[F:12])[C:8]([C:15]([O:17]CC)=[O:16])=[CH:7][C:6]=2[CH:20]=1.[OH-].[Na+]>C1COCC1.C(O)C.O>[Cl:1][C:2]1[CH:3]=[C:4]([C:21]2[CH:26]=[CH:25][CH:24]=[C:23]([O:27][CH3:28])[CH:22]=2)[C:5]2[O:10][CH:9]([C:11]([F:14])([F:13])[F:12])[C:8]([C:15]([OH:17])=[O:16])=[CH:7][C:6]=2[CH:20]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
The ester from Step 1 (0.300 g, 0.727 mmol) was dissolved in THF-ethanol-water (7:2:1, 10 mL). It was treated with sodium hydroxide (0.29 mL of a 2.5 N solution, 0.727 mmol), and stirred at room temperature for 18 hours. The solvent was evaporated and the residue was dissolved in water (10 mL). Ether (10 mL) was added, followed by a few drops of concentrated HCl. The ether layer was separated, and the aqueous phase was extracted with ether (2×10 mL). The ether extracts were combined, dried over MgSO4, filtered, and concentrated in vacuo to yield a-white solid, which was recrystallized in diethyl ether-hexane to afford the title compound as a white solid (0.23 g, 81%): mp 173.1–177.4° C. 1H NMR (CDCl3/300 MHz) 7.81 (s, 1H), 7.39–7.37 (m, 2H), 7.05–7.04 (m, 2H), 6.97–6.94 (m, 1H), 5.71 (q, 1H, J=6.7 Hz), 3.85 (s, 3H). ESHRMS m/z 383.0278 (M−H, Calc'd. 383.029796). Anal. Calc'd. for C18H12ClF3O4: C, 56.20; H, 3.14; Cl, 9.21. Found: C, 55.90; H, 3.11; Cl, 9.48.