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[[3-(2-amino-1,2-dioxoethyl)-1-([1,1'-biphenyl]-2-ylmethyl)-2-ethyl-1H-indol-4-yl]oxy]acetic acid methyl ester → [[3-(2-amino-1,2-dioxoethyl)-1-([1,1'-biphenyl]-2-ylmethyl)-2-ethyl-1H-indol-4-yl]oxy]acetic acid

HRID 2256247
Notes
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Reaction equation

HRID 2256247 reaction equation
C[O:2][C:3](=[O:35])[CH2:4][O:5][C:6]1[CH:14]=[CH:13][CH:12]=[C:11]2[C:7]=1[C:8]([C:30](=[O:34])[C:31]([NH2:33])=[O:32])=[C:9]([CH2:28][CH3:29])[N:10]2[CH2:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][C:17]=1[C:22]1[CH:27]=[CH:26][CH:25]=[CH:24][CH:23]=1>[OH-].[Na+].CO>[NH2:33][C:31](=[O:32])[C:30]([C:8]1[C:7]2[C:11](=[CH:12][CH:13]=[CH:14][C:6]=2[O:5][CH2:4][C:3]([OH:35])=[O:2])[N:10]([CH2:15][C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][C:17]=2[C:22]2[CH:23]=[CH:24][CH:25]=[CH:26][CH:27]=2)[C:9]=1[CH2:28][CH3:29])=[O:34]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

4

Reactant 1

HCID 10695687[[3-(2-amino-1,2-dioxoethyl)-1-([1,1'-biphenyl]-2-ylmethyl)-2-ethyl-1H-indol-4-yl]oxy]acetic acid methyl ester

Product 1

HCID 9955690[[3-(2-amino-1,2-dioxoethyl)-1-([1,1'-biphenyl]-2-ylmethyl)-2-ethyl-1H-indol-4-yl]oxy]acetic acidYield 59.3%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 14798Sodium HydroxideSolvent

Procedure

A mixture of 600 mg (1.3 mmol) of [[3-(2-amino-1,2-dioxoethyl)-1-([1,1'-biphenyl]-2-ylmethyl)-2-ethyl-1H-indol-4-yl]oxy]acetic acid methyl ester in 8 mL of 1N NaOH and 20 mL of MeOH was heated to maintain reflux for 0.67 hours, concentrated at reduced pressure and the residue taken up in EtOAc/water. The aqueous layer was separated, made acidic with 1N HCl and extracted with EtOAc. The EtOAc solution was dried (MgSO4) and evaporated and the residue crystallized from MeOH to give 352 mg (59% yield) of [[3-(2-amino-1,2-dioxoethyl)-1-([1,1'-biphenyl]-2-ylmethyl)-2-ethyl-1H-indol-4-yl]oxy]acetic acid, mp, 211°-214° C.

Workup

  1. temperaturewas heated
  2. temperatureto maintain
  3. temperaturereflux for 0.67 hours
  4. concentrationconcentrated at reduced pressure
  5. customThe aqueous layer was separated
  6. extractionextracted with EtOAc
  7. dry with materialThe EtOAc solution was dried (MgSO4)
  8. customevaporated
  9. customthe residue crystallized from MeOH

Sources & evidence

ORD record
ord-8e7f9d842e534bcfb8f7c594a15e1f3b
Source dataset
uspto-grants-1997_08
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US05654326

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes