Citric Acid → 4-[(1S)-1-({[1-(biphenyl-4-ylmethyl)-1H-indol-7-yl]carbonyl}amino)ethyl]benzoic acid

HRID 1909908Notes

Reaction equation

[C:1]1([C:32]2[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=2)[CH:6]=[CH:5][C:4]([CH2:7][N:8]2[C:16]3[C:11](=[CH:12][CH:13]=[CH:14][C:15]=3[C:17]([NH:19][C@H:20]([C:22]3[CH:31]=[CH:30][C:25]([C:26]([O:28]C)=[O:27])=[CH:24][CH:23]=3)[CH3:21])=[O:18])[CH:10]=[CH:9]2)=[CH:3][CH:2]=1.CO.[OH-].[Na+].C(O)(=O)CC(CC(O)=O)(C(O)=O)O>C1COCC1>[C:1]1([C:32]2[CH:33]=[CH:34][CH:35]=[CH:36][CH:37]=2)[CH:2]=[CH:3][C:4]([CH2:7][N:8]2[C:16]3[C:11](=[CH:12][CH:13]=[CH:14][C:15]=3[C:17]([NH:19][C@H:20]([C:22]3[CH:23]=[CH:24][C:25]([C:26]([OH:28])=[O:27])=[CH:30][CH:31]=3)[CH3:21])=[O:18])[CH:10]=[CH:9]2)=[CH:5][CH:6]=1

Participants

Conditions

Temperature: 65 °C

Procedure

To methyl 4-[(1S)-1-({[1-(biphenyl-4-ylmethyl)-1H-indol-7-yl]carbonyl}amino)ethyl]benzoate (0.30 g) were added methanol (4.0 mL), THF (4.0 mL), and a 1 M aqueous sodium hydroxide solution (3.0 mL), followed by stirring at 65° C. for 2 hours and then at room temperature for 3 days. To the reaction mixture was added a 10% aqueous citric acid solution (4.0 mL), and the precipitated solid was collected by filtration, washed with water and a mixture of diethyl ether/hexane (1/1), and dried at 60° C. under reduced pressure to obtain 4-[(1S)-1-({[1-(biphenyl-4-ylmethyl)-1H-indol-7-yl]carbonyl}amino)ethyl]benzoic acid (0.25 g).

Workup

waitat room temperature for 3 days
filtrationthe precipitated solid was collected by filtration
washwashed with water
additiona mixture of diethyl ether/hexane (1/1)
customdried at 60° C. under reduced pressure

Sources & evidence

ORD record: ord-f2214388ebd64b279ed511f6bc3b5401
Source dataset: uspto-grants-2013_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08598355B2

Reaction notes

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