Cesium carbonate → 6-Chloro-4'-(3-chlorophenyl)-2'-(5-fluoro-2-methylphenyl)-2,3-dihydro-1'-[(tert-butoxycarbonyl)methyl]-2,6'-dioxo spiro[indole-3,3'-piperidine] 1-methoxyethyl trimethylsilane

HRID 1728006Notes

Reaction equation

HRID 1728006 reaction equation
[Cl:1][C:2]1[CH:7]=[C:6]2[NH:8][C:9](=[O:32])[C:10]3([CH:15]([C:16]4[CH:21]=[CH:20][CH:19]=[C:18]([Cl:22])[CH:17]=4)[CH2:14][C:13](=[O:23])[NH:12][CH:11]3[C:24]3[CH:29]=[C:28]([F:30])[CH:27]=[CH:26][C:25]=3[CH3:31])[C:5]2=[CH:4][CH:3]=1.[CH3:33][O:34][CH:35]([Si:37]([CH3:40])([CH3:39])[CH3:38])[CH3:36].[C:41]([O:45][C:46](=[O:49])[CH2:47]Br)([CH3:44])([CH3:43])[CH3:42].C(=O)([O-])[O-].[Cs+].[Cs+].[NH4+].[Cl-]>CN(C)C=O>[Cl:1][C:2]1[CH:7]=[C:6]2[NH:8][C:9](=[O:32])[C:10]3([CH:15]([C:16]4[CH:21]=[CH:20][CH:19]=[C:18]([Cl:22])[CH:17]=4)[CH2:14][C:13](=[O:23])[N:12]([CH2:47][C:46]([O:45][C:41]([CH3:44])([CH3:43])[CH3:42])=[O:49])[CH:11]3[C:24]3[CH:29]=[C:28]([F:30])[CH:27]=[CH:26][C:25]=3[CH3:31])[C:5]2=[CH:4][CH:3]=1.[CH3:33][O:34][CH:35]([Si:37]([CH3:40])([CH3:39])[CH3:38])[CH3:36]

Participants

6

Reactant 4

HCID 10796Cesium carbonateHCID 25517Ammonium ChlorideHCID 79177tert-Butyl bromoacetateHCID 775807686-Chloro-4'-(3-chlorophenyl)-2'-(5-fluoro-2-methylphenyl)-2,3-dihydro-2,6'-dioxo spiro[indole-3,3'-piperidine] 1-methoxyethyl trimethylsilane

Product 1

HCID 775808616-Chloro-4'-(3-chlorophenyl)-2'-(5-fluoro-2-methylphenyl)-2,3-dihydro-1'-[(tert-butoxycarbonyl)methyl]-2,6'-dioxo spiro[indole-3,3'-piperidine] 1-methoxyethyl trimethylsilaneYield 48.7%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Procedure

To a solution of racemic (2′R,3R,4′S)-6-chloro-4′-(3-chlorophenyl)-2′-(5-fluoro-2-methylphenyl)-2,3-dihydro-2,6′-dioxospiro[indole-3,3′-piperidine]-1-methoxyethyl trimethylsilane (1.0 g, 1.67 mmol) prepared in example 55b in N,N-dimethyl-formamide (20 mL) at room temperature was added bromo-acetic acid tert-butyl ester (0.8 g, 4.1 mmol) and cesium carbonate (3.0 g, 9.20 mmol). The reaction mixture was stirred under nitrogen for 4 h, then poured into saturated aqueous NH4Cl solution. The mixture was extracted with ethyl acetate. The organic layers were combined, dried over Na2SO4 and concentrated. The residue was purified by chromatography (EtOAc:Hexanes=1:4) to give racemic (2′R,3R,4′S)-6-chloro-4′-(3-chlorophenyl)-2′-(5-fluoro-2-methylphenyl)-2,3-dihydro-1′-[(tert-butoxycarbonyl)methyl]-2,6′-dioxospiro[indole-3,3′-piperidine]-1-methoxyethyl trimethylsilane as a white foam (Yield 0.58 g, 48.7%).

Workup

  1. extractionThe mixture was extracted with ethyl acetate
  2. dry with materialdried over Na2SO4
  3. concentrationconcentrated
  4. customThe residue was purified by chromatography (EtOAc:Hexanes=1:4)

Sources & evidence

ORD record
ord-105dc1859dc946d495c3079c3a4831e7
Source dataset
uspto-grants-2009_02
Patent number
US07495007B2

Reaction notes

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