Lithium Hydroxide → 1-{3-[(tert-butoxycarbonyl)amino]propyl}-2-[(3,4,5-trimethoxyphenyl)amino]-1H-benzimidazole-6-carboxylic acid

HRID 899919Notes

Reaction equation

HRID 899919 reaction equation
[OH-].[Li+].[C:3]([O:7][C:8]([NH:10][CH2:11][CH2:12][CH2:13][N:14]1[C:18]2[CH:19]=[C:20]([C:23]([O:25]C)=[O:24])[CH:21]=[CH:22][C:17]=2[N:16]=[C:15]1[NH:27][C:28]1[CH:33]=[C:32]([O:34][CH3:35])[C:31]([O:36][CH3:37])=[C:30]([O:38][CH3:39])[CH:29]=1)=[O:9])([CH3:6])([CH3:5])[CH3:4]>O1CCCC1.O>[C:3]([O:7][C:8]([NH:10][CH2:11][CH2:12][CH2:13][N:14]1[C:18]2[CH:19]=[C:20]([C:23]([OH:25])=[O:24])[CH:21]=[CH:22][C:17]=2[N:16]=[C:15]1[NH:27][C:28]1[CH:29]=[C:30]([O:38][CH3:39])[C:31]([O:36][CH3:37])=[C:32]([O:34][CH3:35])[CH:33]=1)=[O:9])([CH3:5])([CH3:4])[CH3:6]

Participants

5

Reactant 2

HCID 3939Lithium HydroxideHCID 11962078methyl 1-{3-[(tert-butoxycarbonyl)amino]propyl}-2-[(3,4,5-trimethoxyphenyl)amino]-1H-benzimidazole-6-carboxylate

Product 1

HCID 687922531-{3-[(tert-butoxycarbonyl)amino]propyl}-2-[(3,4,5-trimethoxyphenyl)amino]-1H-benzimidazole-6-carboxylic acid

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 8028TetrahydrofuranSolvent

Procedure

Lithium hydroxide (2.18 g, 6 eq) is added to a solution of methyl 1-{3-[(tert-butoxycarbonyl)amino]propyl}-2-[(3,4,5-trimethoxyphenyl)amino]-1H-benzimidazole-6-carboxylate (4.4 g, 1 eq) in a mixture of tetrahydrofuran (40 ml) and water (30 ml). The mixture is heated under reflux for 18 hours then cooled down to ambient temperature and concentrated under reduced pressure at 40° C. Dichloromethane (150 ml) and water (100 ml) are added to the residue. The mixture is acidified by the addition of acetic acid to pH 5. After decantation and extractions, the combined organic phases are dried over sodium sulphate and concentrated under reduced pressure. The solid obtained is washed with ethyl ether (3.95 g; 93%).

Workup

  1. temperatureThe mixture is heated
  2. temperatureunder reflux for 18 hours
  3. concentrationconcentrated under reduced pressure at 40° C
  4. additionDichloromethane (150 ml) and water (100 ml) are added to the residue
  5. additionThe mixture is acidified by the addition of acetic acid to pH 5
  6. extractionAfter decantation and extractions
  7. dry with materialthe combined organic phases are dried over sodium sulphate
  8. concentrationconcentrated under reduced pressure
  9. customThe solid obtained
  10. washis washed with ethyl ether (3.95 g; 93%)

Sources & evidence

ORD record
ord-a29414aaaf8c49c7842c8da21507a65b
Source dataset
uspto-grants-2008_04
Patent number
US07355052B2

Reaction notes

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