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Trifluoroacetic acid → 3-(trans-1-benzyl-4-phenyl-3-pyrrolidinylcarbonyl)-4-(S)-phenyl-2-oxazolidinone

HRID 53352
Notes
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Reaction equation

HRID 53352 reaction equation
[C:1]([N:11]1[C@@H:15]([C:16]2[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=2)[CH2:14][O:13][C:12]1=[O:22])(=[O:10])/[CH:2]=[CH:3]/[C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1.[CH2:23]([N:30]([CH2:34][Si](C)(C)C)[CH2:31]OC)[C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1.FC(F)(F)C(O)=O>C1(C)C=CC=CC=1.C(OCC)(=O)C>[CH2:23]([N:30]1[CH2:34][C@@H:3]([C:4]2[CH:5]=[CH:6][CH:7]=[CH:8][CH:9]=2)[C@H:2]([C:1]([N:11]2[C@@H:15]([C:16]3[CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=3)[CH2:14][O:13][C:12]2=[O:22])=[O:10])[CH2:31]1)[C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

6

Reactant 3

HCID 6422Trifluoroacetic acidHCID 353442Benzyl(methoxymethyl)((trimethylsilyl)methyl)amineHCID 679769(4S)-4-Phenyl-3-(3-phenylprop-2-enoyl)-1,3-oxazolidin-2-one

Product 1

HCID 677115143-(trans-1-benzyl-4-phenyl-3-pyrrolidinylcarbonyl)-4-(S)-phenyl-2-oxazolidinone

Reagents, catalysts & solvents 2

HCID 1140Toluene
Solvent
HCID 8857Ethyl AcetateSolvent

Procedure

The compound from step 8b (294 mg, 1.2 mmol) was dissolved in toluene (10 mL), and the solution flushed with N2. N-benzyl-N(methoxymethyl)trimethylsilylmethylamine (284 mg, 0.227 mmol) was added, the mixture was stirred for 20 minutes and trifluoroacetic acid (1M, 0.1 mL, 0.10 mmol) was added dropwise. The mixture was stirred for 1.5 hour at room temperature, then diluted with 50 mL of ethyl acetate, washed with 5% aqueous NaHCO3 and dried over Na2SO4. The solvent was removed and the residue was dried under vacuum (542 mg). The isomers were separated by chromatography on silica gel, and the major isomer (3R,4R) was taken to the next step. MS m/z 427 (M+H)+.

Workup

  1. customthe solution flushed with N2
  2. stirringThe mixture was stirred for 1.5 hour at room temperature
  3. washwashed with 5% aqueous NaHCO3
  4. dry with materialdried over Na2SO4
  5. customThe solvent was removed
  6. customthe residue was dried under vacuum (542 mg)
  7. customThe isomers were separated by chromatography on silica gel

Sources & evidence

ORD record
ord-8ae69679a31b46ce87909e78682d162a
Source dataset
uspto-grants-1997_04
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US05618949

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes