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Cesium carbonate → 4-{4-Chloro-3-[3,3,3-trifluoro-2-hydroxy-1-methyl-2-(4-methyl-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-propyl]-phenoxymethyl}-benzoic acid ethyl ester

HRID 2386697
Notes
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Reaction equation

HRID 2386697 reaction equation
[Cl:1][C:2]1[CH:7]=[CH:6][C:5]([OH:8])=[CH:4][C:3]=1[CH:9]([CH3:28])[C:10]([C:16]1[CH:17]=[CH:18][C:19]2[O:24][CH2:23][C:22](=[O:25])[N:21]([CH3:26])[C:20]=2[CH:27]=1)([OH:15])[C:11]([F:14])([F:13])[F:12].[CH2:29]([O:31][C:32](=[O:41])[C:33]1[CH:38]=[CH:37][C:36]([CH2:39]Br)=[CH:35][CH:34]=1)[CH3:30].C(=O)([O-])[O-].[Cs+].[Cs+]>CN(C)C(=O)C>[CH2:29]([O:31][C:32](=[O:41])[C:33]1[CH:38]=[CH:37][C:36]([CH2:39][O:8][C:5]2[CH:6]=[CH:7][C:2]([Cl:1])=[C:3]([CH:9]([CH3:28])[C:10]([OH:15])([C:16]3[CH:17]=[CH:18][C:19]4[O:24][CH2:23][C:22](=[O:25])[N:21]([CH3:26])[C:20]=4[CH:27]=3)[C:11]([F:12])([F:13])[F:14])[CH:4]=2)=[CH:35][CH:34]=1)[CH3:30]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

5

Reactant 3

HCID 10796Cesium carbonateHCID 954261Ethyl 4-(bromomethyl)benzoateHCID 666971956-[2-(2-Chloro-5-hydroxy-phenyl)-1-hydroxy-1-trifluoromethyl-propyl]-4-methyl-4H-benzo[1,4]oxazin-3-one

Product 1

HCID 666972974-{4-Chloro-3-[3,3,3-trifluoro-2-hydroxy-1-methyl-2-(4-methyl-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-yl)-propyl]-phenoxymethyl}-benzoic acid ethyl esterYield 83.2%

Reagents, catalysts & solvents

1
HCID 31374DimethylacetamideSolvent

Procedure

To a solution of 6-[2-(2-chloro-5-hydroxy-phenyl)-1-hydroxy-1-trifluoromethyl-propyl]-4-methyl-4H-benzo[1,4]oxazin-3-one (83 mg) in N,N-dimethylacetamide (1.6 ml) were added ethyl-4-(bromomethyl)benzoate (56 mg) and cesium carbonate (72 mg). The mixture was stirred for 4 h at room temperature. Ice water was added and the mixture was extracted with EtOAc. The organic phase was washed with water and dried (MgSO4). The product was purified by chromatography (SiO2, cyclohexane/EtOAc 1:0=>3:2) to give the title compound (96 mg) as colorless foam. MS (m/e, ISP neg. ion)=578.3 [M−H+].

Workup

  1. extractionthe mixture was extracted with EtOAc
  2. washThe organic phase was washed with water
  3. dry with materialdried (MgSO4)
  4. customThe product was purified by chromatography (SiO2, cyclohexane/EtOAc 1:0=>3:2)

Sources & evidence

ORD record
ord-59ed24c77d0f42f7a26c015a82934526
Source dataset
uspto-grants-2012_09
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US08268820B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes