Hydrochloric Acid → 2-Phenyl-1,3-benzothiazole-6-carboxylic acid

HRID 1852577Notes

Reaction equation

HRID 1852577 reaction equation
[C:1]1([C:7]2[S:8][C:9]3[CH:15]=[C:14]([C:16]([O:18]CC)=[O:17])[CH:13]=[CH:12][C:10]=3[N:11]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.[Li+].[OH-].Cl>C1COCC1.O>[C:1]1([C:7]2[S:8][C:9]3[CH:15]=[C:14]([C:16]([OH:18])=[O:17])[CH:13]=[CH:12][C:10]=3[N:11]=2)[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=1

Participants

6

Reactant 3

HCID 313Hydrochloric AcidHCID 3939Lithium HydroxideHCID 50849803Ethyl 2-phenyl-benzothiazole-6-carboxylate

Product 1

HCID 6204592-Phenyl-1,3-benzothiazole-6-carboxylic acidYield 100.4%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Procedure

Ethyl 2-phenyl-benzothiazole-6-carboxylate 1y (220 mg, 0.78 mmol) was stirred with LiOH (74 mg, 3.1 mmol) in THF (4 mL) and H2O (4 mL) for 16 h. Aqueous 1N HCl solution was added to the mixture to adjust pH to 3-4. The resulting mixture was extracted with EtOAc (2×). The organic solution was washed with aq. NaCl, dried over Na2SO4 and concentrated to give 1z (200 mg).

Workup

  1. extractionThe resulting mixture was extracted with EtOAc (2×)
  2. washThe organic solution was washed with aq. NaCl
  3. dry with materialdried over Na2SO4
  4. concentrationconcentrated

Sources & evidence

ORD record
ord-be6e8f1a4f4843c88d8369fbd284f77e
Source dataset
uspto-grants-2015_02
Patent number
US08962607B2

Reaction notes

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