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Phosphorus tribromide → 1-[4'-(4-Bromomethyl-3-methyl-isoxazol-5-yl)-biphenyl-4-yl]-cyclopropanecarboxylic acid ethyl ester

HRID 1183272
Notes
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Reaction equation

HRID 1183272 reaction equation
P(Br)(Br)[Br:2].[CH2:5]([O:7][C:8]([C:10]1([C:13]2[CH:18]=[CH:17][C:16]([C:19]3[CH:24]=[CH:23][C:22]([C:25]4[O:29][N:28]=[C:27]([CH3:30])[C:26]=4[CH2:31]O)=[CH:21][CH:20]=3)=[CH:15][CH:14]=2)[CH2:12][CH2:11]1)=[O:9])[CH3:6].C([O-])(O)=O.[Na+]>COCCOC>[CH2:5]([O:7][C:8]([C:10]1([C:13]2[CH:18]=[CH:17][C:16]([C:19]3[CH:24]=[CH:23][C:22]([C:25]4[O:29][N:28]=[C:27]([CH3:30])[C:26]=4[CH2:31][Br:2])=[CH:21][CH:20]=3)=[CH:15][CH:14]=2)[CH2:12][CH2:11]1)=[O:9])[CH3:6]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 24614Phosphorus tribromideHCID 516892Sodium BicarbonateHCID 665772181-[4'-(4-Hydroxymethyl-3-methyl-isoxazol-5-yl)-biphenyl-4-yl]-cyclopropanecarboxylic acid ethyl ester

Product 1

HCID 665771991-[4'-(4-Bromomethyl-3-methyl-isoxazol-5-yl)-biphenyl-4-yl]-cyclopropanecarboxylic acid ethyl ester

Reagents, catalysts & solvents 1

HCID 8071
1,2-Dimethoxyethane
Solvent

Procedure

Phosphorus tribromide (0.43 mL, 4.53 mmol) was added to a solution of 1-[4′-(4-hydroxymethyl-3-methyl-isoxazol-5-yl)-biphenyl-4-yl]-cyclopropanecarboxylic acid ethyl ester (1.14 g, 3.02 mmol) in DME (30 mL) at 0° C. The reaction was stirred overnight at room temperature, and then cooled to 0° C. and neutralized with saturated aqueous NaHCO3 to pH 7. The mixture was partitioned between CH2Cl2 and H2O, and the aqueous layer was extracted with CH2Cl2. The combined organic layers were dried over MgSO4, filtered, and concentrated, and the residue was purified by silica gel chromatography to give the title compound.

Workup

  1. customThe mixture was partitioned between CH2Cl2 and H2O
  2. extractionthe aqueous layer was extracted with CH2Cl2
  3. dry with materialThe combined organic layers were dried over MgSO4
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customthe residue was purified by silica gel chromatography

Sources & evidence

ORD record
ord-0d39e51113834f83854db4451e3e06ae
Source dataset
uspto-grants-2014_03
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08664220B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes