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Hydrochloric Acid → 8-(5-(3,4,5-Trichlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazol-3-yl)indolizine-5-carboxylic acid

HRID 1037090
Notes
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Reaction equation

HRID 1037090 reaction equation
[Cl:1][C:2]1[CH:3]=[C:4]([C:9]2([C:28]([F:31])([F:30])[F:29])[O:13][N:12]=[C:11]([C:14]3[C:22]4[N:18]([CH:19]=[CH:20][CH:21]=4)[C:17]([C:23]([O:25]CC)=[O:24])=[CH:16][CH:15]=3)[CH2:10]2)[CH:5]=[C:6]([Cl:8])[CH:7]=1.[OH-].[Na+].[ClH:34]>O.CO>[Cl:1][C:2]1[CH:3]=[C:4]([C:9]2([C:28]([F:30])([F:31])[F:29])[O:13][N:12]=[C:11]([C:14]3[C:22]4[N:18]([CH:19]=[CH:20][CH:21]=4)[C:17]([C:23]([OH:25])=[O:24])=[CH:16][CH:15]=3)[CH2:10]2)[CH:5]=[C:6]([Cl:8])[C:7]=1[Cl:34]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 313Hydrochloric AcidHCID 14798Sodium HydroxideHCID 86685521Ethyl 8-(5-(3,5-dichlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazol-3-yl)indolizine-5-carboxylate

Product 1

HCID 866855268-(5-(3,4,5-Trichlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazol-3-yl)indolizine-5-carboxylic acidYield 65%

Reagents, catalysts & solvents 1

HCID 22242641
Methanol--water (1/1)
Solvent

Procedure

A solution of ethyl 8-(5-(3,5-dichlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazol-3-yl)indolizine-5-carboxylate (130 mg, 0.26 mmol) and NaOH (52 mg, 1.29 mmol) in H2O-MeOH (1:1, 20 mL) was stirred at rt for 3 h. The mixture was acidified with 2 N HCl and extracted with ethyl acetate (3×20 mL). The combined organic layers were washed with brine, dried over Na2SO4, filtered and concentrated under reduced pressure. The residue was purified by prep-TLC to give 8-(5-(3,4,5-trichlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazol-3-yl)indolizine-5-carboxylic acid (80 mg; yield 65%) as a yellow solid. MS: m/z=477.0 (M+1, ESI+).

Workup

  1. extractionextracted with ethyl acetate (3×20 mL)
  2. washThe combined organic layers were washed with brine
  3. dry with materialdried over Na2SO4
  4. filtrationfiltered
  5. concentrationconcentrated under reduced pressure
  6. customThe residue was purified by prep-TLC

Sources & evidence

ORD record
ord-5daab7ef6b1942adb718d70668c50fd9
Source dataset
uspto-grants-2013_10
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08546357B2

Reaction notes

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