Ethyl 3-{[5-(biphenyl-4-yl)-4,6-difluoro-1H-benzimidazol-2-yl]oxy}cyclopentanecarboxylate → 3-{[5-(biphenyl-4-yl)-4,6-difluoro-1H-benzimidazol-2-yl]oxy}cyclo-pentanecarboxylic acid

HRID 340793Notes

Reaction equation

HRID 340793 reaction equation
[C:1]1([C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)[CH:6]=[CH:5][C:4]([C:7]2[C:26]([F:27])=[CH:25][C:10]3[NH:11][C:12]([O:14][CH:15]4[CH2:19][CH2:18][CH:17]([C:20]([O:22]CC)=[O:21])[CH2:16]4)=[N:13][C:9]=3[C:8]=2[F:28])=[CH:3][CH:2]=1.O([Si](C)(C)C)[K]>C1COCC1.CCOC(C)=O>[C:1]1([C:29]2[CH:30]=[CH:31][CH:32]=[CH:33][CH:34]=2)[CH:2]=[CH:3][C:4]([C:7]2[C:26]([F:27])=[CH:25][C:10]3[NH:11][C:12]([O:14][CH:15]4[CH2:19][CH2:18][CH:17]([C:20]([OH:22])=[O:21])[CH2:16]4)=[N:13][C:9]=3[C:8]=2[F:28])=[CH:5][CH:6]=1

Participants

5

Reactant 2

HCID 67406155Ethyl 3-{[5-(biphenyl-4-yl)-4,6-difluoro-1H-benzimidazol-2-yl]oxy}cyclopentanecarboxylateHCID 178504318HCID 178504318, compound

Product 1

HCID 533723783-{[5-(biphenyl-4-yl)-4,6-difluoro-1H-benzimidazol-2-yl]oxy}cyclo-pentanecarboxylic acid

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 8857Ethyl AcetateSolvent

Procedure

Ethyl 3-{[5-(biphenyl-4-yl)-4,6-difluoro-1H-benzimidazol-2-yl]oxy}cyclopentanecarboxylate (0.039 g, 0.084 mmol) was dissolved in 1 mL of THF and treated with KOTMS (0.032 g, 0.253 mmol). The reaction mixture was stirred overnight at ambient temperature, and then diluted with EtOAc and washed with 2 N HCl. The layers were separated and the aqueous layer was further extracted with EtOAc. The combined organic layers were washed with brine, dried over Na2SO4, filtered, and concentrated to afford the title compound as a white solid. LCMS: calculated for C25H20F2N2O3 434.43, observed m/e 434.9 (M+H)+ (Rt 2.24/4 min). 1H NMR (500 MHz, d6-DMSO): δ7.77 (d, 2H), 7.73 (d, 2H), 7.56-7.46 (m, 4H), 7.39 (m, 111), 7.14 (d, 1H), 5.50 (m, 1H), 2.95 (m, 1H), 2.20-1.80 (m, 6H).

Workup

  1. washwashed with 2 N HCl
  2. customThe layers were separated
  3. extractionthe aqueous layer was further extracted with EtOAc
  4. washThe combined organic layers were washed with brine
  5. dry with materialdried over Na2SO4
  6. filtrationfiltered
  7. concentrationconcentrated

Sources & evidence

ORD record
ord-be5e999678c0489b993412ddfd601f19
Source dataset
uspto-grants-2014_11
Patent number
US08895596B2

Reaction notes

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