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Hydrochloric Acid → 2-(1-(Benzo[d]thiazol-2-ylcarbamoyl)indolin-6-yl)thiazole-4-carboxylic acid

HRID 2178254
Notes
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Reaction equation

HRID 2178254 reaction equation
[S:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[NH:10][C:11]([N:13]1[C:21]2[C:16](=[CH:17][CH:18]=[C:19]([C:22]3[S:23][CH:24]=[C:25]([C:27]([O:29]CC)=[O:28])[N:26]=3)[CH:20]=2)[CH2:15][CH2:14]1)=[O:12].[Li+].[OH-].O.Cl>CO.CCOC(C)=O>[S:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[NH:10][C:11]([N:13]1[C:21]2[C:16](=[CH:17][CH:18]=[C:19]([C:22]3[S:23][CH:24]=[C:25]([C:27]([OH:29])=[O:28])[N:26]=3)[CH:20]=2)[CH2:15][CH2:14]1)=[O:12]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 962WaterHCID 3939Lithium HydroxideHCID 59418682Ethyl 2-(1-(benzo[d]thiazol-2-ylcarbamoyl)indolin-6-yl)thiazole-4-carboxylate

Product 1

HCID 468402062-(1-(Benzo[d]thiazol-2-ylcarbamoyl)indolin-6-yl)thiazole-4-carboxylic acidYield 14.2%

Reagents, catalysts & solvents 2

HCID 887MethanolSolvent
HCID 8857Ethyl AcetateSolvent

Procedure

The title compound 2-(1-(benzo[d]thiazol-2-ylcarbamoyl)indolin-6-yl)thiazole-4-carboxylic acid (28) was prepared by the following procedure: A mixture of ethyl 2-(1-(benzo[d]thiazol-2-ylcarbamoyl)indolin-6-yl)thiazole-4-carboxylate (28E) (22 mg, 0.05 mmol) and LiOH (12 mg, 0.49 mmol) was stirred in MeOH (2 mL) and water (1 mL) for 20 h. The mixture was diluted with EtOAc (5 mL) and acidified with 1M HCl. The organic layer was isolated, washed with H2O, dried over MgSO4, filtered and concentrated under reduced pressure. The crude material was purified by HPLC, to provide 3.0 mg (14%) of the desired product 2-(1-(benzo[d]thiazol-2-ylcarbamoyl)indolin-6-yl)thiazole-4-carboxylic acid (28). LC/MS (APCI): m/z 423.1 (M+H), 844.8 (2M+1).

Workup

  1. customThe title compound 2-(1-(benzo[d]thiazol-2-ylcarbamoyl)indolin-6-yl)thiazole-4-carboxylic acid (28) was prepared by the following procedure
  2. customThe organic layer was isolated
  3. washwashed with H2O
  4. dry with materialdried over MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customThe crude material was purified by HPLC

Sources & evidence

ORD record
ord-0b7795d3436c4e1fab7421df781daea8
Source dataset
uspto-grants-2015_06
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US09067928B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes