Sodium Hydroxide → 4-[2-(Indol-2-yl)ethyloxy]benzoic acid
Reaction equation
[NH:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[CH:3]=[C:2]1[CH2:10][CH2:11][O:12][C:13]1[CH:22]=[CH:21][C:16]([C:17]([O:19]C)=[O:18])=[CH:15][CH:14]=1.[OH-].[Na+]>CO>[NH:1]1[C:9]2[C:4](=[CH:5][CH:6]=[CH:7][CH:8]=2)[CH:3]=[C:2]1[CH2:10][CH2:11][O:12][C:13]1[CH:22]=[CH:21][C:16]([C:17]([OH:19])=[O:18])=[CH:15][CH:14]=1Participants
4
Reactant 2
Product 1
Reagents, catalysts & solvents 1
Procedure
Ester 4-3 (150 mg, 0.51 mmol) and 1N NaOH (1.3 mL, 1.3 mmol) were combined in 10 mL MeOH. After 16 h additional 1N NaOH (5 mL, 5 mmol) was added, and 7 h later, 5 mL more 1N NaOH. After a total of 2 d the mixture was heated at 50° for 1 h, then concentrated, redissolved in H2O, washed with EtOAc, and the pH of the aqueous layer was adjusted to 1 with 20% KHSO4. This was extracted with EtOAc, and this organic layer was washed with brine, dried (MgSO4) and concentrated, providing 4-4 as a gray solid. Rf 0.48 (silica, EtOAc).