Phosphate → (5R)-5-(2,2-Dimethyl-4H-1,3-benzodioxin-6-yl)-3-[6-(4-pentyn-1-yloxy)hexyl]-1,3-oxazolidin-2-one

HRID 2118339Notes

Reaction equation

HRID 2118339 reaction equation
[CH3:1][C:2]1([CH3:18])[O:7][C:6]2[CH:8]=[CH:9][C:10]([C@H:12]3[O:16][C:15](=[O:17])[NH:14][CH2:13]3)=[CH:11][C:5]=2[CH2:4][O:3]1.[H-].[Na+].[CH2:21]([O:26][CH2:27][CH2:28][CH2:29][CH2:30][CH2:31][CH2:32]Br)[CH2:22][CH2:23][C:24]#[CH:25].P([O-])([O-])([O-])=O>CN(C=O)C.O>[CH3:1][C:2]1([CH3:18])[O:7][C:6]2[CH:8]=[CH:9][C:10]([C@H:12]3[O:16][C:15](=[O:17])[N:14]([CH2:32][CH2:31][CH2:30][CH2:29][CH2:28][CH2:27][O:26][CH2:21][CH2:22][CH2:23][C:24]#[CH:25])[CH2:13]3)=[CH:11][C:5]=2[CH2:4][O:3]1

Participants

7

Reactant 4

HCID 1061PhosphateHCID 24758Sodium hydrideHCID 10933894(5R)-5-(2,2-Dimethyl-4H-1,3-benzodioxin-6-yl)-1,3-oxazolidin-2-oneHCID 218671996-Bromohexyl 4-pentyn-1-yl ether

Product 1

HCID 86607678(5R)-5-(2,2-Dimethyl-4H-1,3-benzodioxin-6-yl)-3-[6-(4-pentyn-1-yloxy)hexyl]-1,3-oxazolidin-2-oneYield 84%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent2×

Procedure

A solution of (5R)-5-(2,2-dimethyl-4H-1,3-benzodioxin-6-yl)-1,3-oxazolidin-2-one (Example 1vi) (500 mg) in DMF (15 ml) under nitrogen at 0° was treated with sodium hydride (60% dispersion in mineral oil, 96 mg) and the mixture stirred at 20° for 10 min. A solution of 6-bromohexyl 4-pentyn-1-yl ether (WO 02/066422) (545 mg) in DMF (1 ml) was added and the mixture stirred at 20° for 18 h. Phosphate buffer solution (pH 6.5) and water were added and the mixture was extracted with EtOAc. The extract was washed with water and dried (Na2SO4). Solvent evaporation in vacuo gave a residue, which was purified by flash chromatography on silica gel. Elution with EtOAc-PE (2:3) gave the title compound (700 mg). LCMS RT=3.48 min.

Workup

  1. stirringthe mixture stirred at 20° for 18 h
  2. extractionthe mixture was extracted with EtOAc
  3. washThe extract was washed with water
  4. dry with materialdried (Na2SO4)
  5. customSolvent evaporation in vacuo
  6. customgave a residue, which
  7. customwas purified by flash chromatography on silica gel
  8. washElution with EtOAc-PE (2:3)

Sources & evidence

ORD record
ord-30bd76360b7e4f5b8f4de3a873c99c96
Source dataset
uspto-grants-2008_10
Patent number
US07442839B2

Reaction notes

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