Hydrochloric Acid → 4-(3-Bromophenoxy)butanoic acid
Reaction equation
[Br:1][C:2]1[CH:3]=[C:4]([CH:14]=[CH:15][CH:16]=1)[O:5][CH2:6][CH2:7][CH2:8][C:9]([O:11]CC)=[O:10].O.Cl>C1COCC1>[Br:1][C:2]1[CH:3]=[C:4]([CH:14]=[CH:15][CH:16]=1)[O:5][CH2:6][CH2:7][CH2:8][C:9]([OH:11])=[O:10]Participants
5
Reactant 3
Product 1
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 50 °C
Procedure
Ethyl 4-(3-bromophenoxy)butanoate 6 from Example 5 was taken up in 100 mL THF and 50 mL water and treated with lithium hydroxide LiOH (hydrate, 4.9 g). The whole was heated at 50° C. for 2 days. The mixture was cooled to room temperature and acidified to pH 1 with 2N HCl. The aqueous was extracted with ethylacetate. The combined organics were washed with brine and dried over sodium sulfate to give crude 4-(3-Bromophenoxy)butanoic acid 7 as a sticky solid. 1H NMR (DMSO-d6, 500 MHz) 7.24 (m, 1H), 7.13 (m, 1H), 7.11 (m, 1H), 6.95 (m, 1H), 3.99 (m, 2H), 2.37 (m, 2H), 1.94 (m, 2H).
Workup
- temperatureThe mixture was cooled to room temperature
- extractionThe aqueous was extracted with ethylacetate
- washThe combined organics were washed with brine
- dry with materialdried over sodium sulfate
Sources & evidence
- ORD record
- ord-ea1aef4b69a5453e985e3695e334bb54
- Source dataset
- uspto-grants-2013_03
- Patent number
- US08399690B2
Reaction notes
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