Allyl iodide → HCID 54574304, compound

HRID 429481Notes

Reaction equation

HRID 429481 reaction equation
[CH2:1]([C@H:8]1[CH2:12][O:11][C:10](=[O:13])[N:9]1[C:14](=[O:22])[CH2:15][C:16]1[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C[Si]([N-][Si](C)(C)C)(C)C.[Na+].[CH2:33](I)[CH:34]=[CH2:35].[Cl-].[NH4+]>C(OCC)(=O)C.CCCCCC.O1CCCC1>[CH2:1]([C@H:8]1[CH2:12][O:11][C:10](=[O:13])[N:9]1[C:14](=[O:22])[CH:15]([C:16]1[CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=1)[CH2:35][CH:34]=[CH2:33])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

Participants

7

Reactant 4

HCID 11166Allyl iodideHCID 25517Ammonium ChlorideHCID 2724254Sodium bis(trimethylsilyl)amideHCID 11130206(4S)-3-(2-Phenylacetyl)-4-(phenylmethyl)-2-oxazolidinone

Product 1

HCID 54574304HCID 54574304, compound

Reagents, catalysts & solvents 2

HCID 8028TetrahydrofuranSolventHCID 21226206Ethyl acetate hexaneSolvent

Procedure

Combine (S)-4-benzyl-3-phenylacetyl-2-oxazolidinone (14.13 g, 47.9 mmol) and tetrahydrofuran (150 mL). Cool in a dry-ice/acetone bath. Add dropwise a solution of sodium bis(trimethylsilyl)amide (52.6 mL, 1.0 M in tetrahydrofuran, 52.6 mmol). After 25 minutes, add allyl iodide (13.12 mL, 143.5 mmol) and then replace the bath with a dry-ice/carbon tetrachloride bath. After 1 hour, quench the reaction by the addition of a saturated aqueous ammonium chloride solution, extract with diethyl ether, and separate the layers. Dry the organic layer over Na2SO4, filter, and evaporate in vacuo to give a residue. Chromatograph the residue on silica gel eluting with 15% ethyl acetate/hexane. Combine the product containing fractions, evaporate, and recrytallize from chloroform/hexane to give (S)-4-benzyl-3-(2-phenylpent-4-enoyl)-2-oxazolidinone: Rf=0.40 (silica gel, 15% ethyl acetate/hexane).

Workup

  1. temperatureCool in a dry-ice/acetone bath
  2. waitAfter 1 hour
  3. customquench
  4. customthe reaction
  5. extractionextract with diethyl ether
  6. customseparate the layers
  7. dry with materialDry the organic layer over Na2SO4
  8. filtrationfilter
  9. customevaporate in vacuo
  10. customto give a residue
  11. additioncontaining fractions
  12. customevaporate

Sources & evidence

ORD record
ord-303de488a352438eb74f476f594a8cfa
Source dataset
uspto-grants-2001_11
Patent number
US06316445B1

Reaction notes

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