Lithium Hydroxide → (S)-3-[3-(1,4-Dimethyl-1H-indol-3-ylmethyl)-2-oxo-2,3-dihydro-benzoimidazol-1-yl]-hexanoic acid

HRID 1747377Notes

Reaction equation

HRID 1747377 reaction equation
C([O:3][C:4](=[O:32])[CH2:5][C@@H:6]([N:10]1[C:14]2[CH:15]=[CH:16][CH:17]=[CH:18][C:13]=2[N:12]([CH2:19][C:20]2[C:28]3[C:23](=[CH:24][CH:25]=[CH:26][C:27]=3[CH3:29])[N:22]([CH3:30])[CH:21]=2)[C:11]1=[O:31])[CH2:7][CH2:8][CH3:9])C.[Li+].[OH-]>O1CCOCC1.O>[CH3:30][N:22]1[C:23]2[C:28](=[C:27]([CH3:29])[CH:26]=[CH:25][CH:24]=2)[C:20]([CH2:19][N:12]2[C:13]3[CH:18]=[CH:17][CH:16]=[CH:15][C:14]=3[N:10]([C@@H:6]([CH2:7][CH2:8][CH3:9])[CH2:5][C:4]([OH:32])=[O:3])[C:11]2=[O:31])=[CH:21]1

Participants

5

Reactant 2

HCID 3939Lithium HydroxideHCID 59497309(S)-3-[3-(1,4-Dimethyl-1H-indol-3-ylmethyl)-2-oxo-2,3-dihydro-benzoimidazol-1-yl]-hexanoic acid ethyl ester

Product 1

HCID 25127851(S)-3-[3-(1,4-Dimethyl-1H-indol-3-ylmethyl)-2-oxo-2,3-dihydro-benzoimidazol-1-yl]-hexanoic acid

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 312751,4-DioxaneSolvent

Procedure

To a solution of (S)-3-[3-(1,4-Dimethyl-1H-indol-3-ylmethyl)-2-oxo-2,3-dihydro-benzoimidazol-1-yl]-hexanoic acid ethyl ester (4.2 g, 9.8 mmol) in 1,4-dioxane (100 mL) and water (10 mL) was added LiOH (234 mg, 9.8 mmol) at room temperature. The solution was stirred at the same temperature for 12 hours. The solution was concentrated and water was added to the residue. The solution was acidified by 12N HCl in an ice-bath. The solid that precipitated out from the solution was collected by filtration. The solid was dried under vacuum and was confirmed to be the desirable product (S)-3-[3-(1,4-Dimethyl-1H-indol-3-ylmethyl)-2-oxo-2,3-dihydro-benzoimidazol-1-yl]-hexanoic acid (3.7 g, 92%). LC-MS (M++1): 406.27.

Workup

  1. concentrationThe solution was concentrated
  2. additionwater was added to the residue
  3. customThe solution was acidified by 12N HCl in an ice-bath
  4. customThe solid that precipitated out from the solution
  5. filtrationwas collected by filtration
  6. customThe solid was dried under vacuum

Sources & evidence

ORD record
ord-7e5981bec58c46e2939e08317a66d90d
Source dataset
uspto-grants-2015_10
Patent number
US09150556B2

Reaction notes

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