Phosphate → (5R)-3-(6-{2-[(4-bromobenzyl)oxy]ethoxy}hexyl)-5-(2,2-dimethyl4H-1,3-benzodioxin-6-yl)-1,3-oxazolidin-2-one

HRID 503086Notes

Reaction equation

HRID 503086 reaction equation
[CH3:1][C:2]1([CH3:28])[O:7][C:6]2[CH:8]=[CH:9][C:10]([C@H:12]3[O:16][C:15](=[O:17])[N:14]([CH2:18][CH2:19][CH2:20][CH2:21][CH2:22][CH2:23][O:24][CH2:25][CH2:26][OH:27])[CH2:13]3)=[CH:11][C:5]=2[CH2:4][O:3]1.[H-].[Na+].[Br:31][C:32]1[CH:39]=[CH:38][C:35]([CH2:36]Br)=[CH:34][CH:33]=1.P([O-])([O-])([O-])=O>CN(C=O)C.O>[Br:31][C:32]1[CH:39]=[CH:38][C:35]([CH2:36][O:27][CH2:26][CH2:25][O:24][CH2:23][CH2:22][CH2:21][CH2:20][CH2:19][CH2:18][N:14]2[CH2:13][C@@H:12]([C:10]3[CH:9]=[CH:8][C:6]4[O:7][C:2]([CH3:28])([CH3:1])[O:3][CH2:4][C:5]=4[CH:11]=3)[O:16][C:15]2=[O:17])=[CH:34][CH:33]=1

Participants

7

Reactant 4

HCID 1061PhosphateHCID 24758Sodium hydrideHCID 685274-Bromobenzyl bromideHCID 468319552-Oxazolidinone, 5-(2,2-diMethyl-4H-1,3-benzodioxin-6-yl)-3-[6-(2-hydroxyethoxy)hexyl]-, (5R)-

Product 1

HCID 66845394(5R)-3-(6-{2-[(4-bromobenzyl)oxy]ethoxy}hexyl)-5-(2,2-dimethyl4H-1,3-benzodioxin-6-yl)-1,3-oxazolidin-2-oneYield 74.3%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Procedure

A solution of (5R)-5-(2,2-dimethyl-4H-1,3-benzodioxin-6-yl)-3-{6-[(2-hydroxyethyl)oxy]hexyl}-1,3-oxazolidin-2-one (2.00 g) in DMF (25 ml) under nitrogen was treated with sodium hydride (244 mg, 60% in oil) and the mixture was stirred at 200 for 15 min. 4-Bromobenzyl bromide (1.40 g) was added and the mixture was stirred at 200 for 18 h. Phosphate buffer solution (50 ml, pH6.5) and water (50 ml) were added and the mixture was extracted with EtOAc. The extract was washed with water, dried (Na2SO4) and the solvent evaporated in vacuo to give a residue. The residue was purified by chromatography on flash silica gel (40 mm diameter column). Elution with EtOAc-PE (1:1) gave the title compound (2.125 g). LCMS RT=3.77 min.

Workup

  1. stirringthe mixture was stirred at 200 for 18 h
  2. extractionthe mixture was extracted with EtOAc
  3. washThe extract was washed with water
  4. dry with materialdried (Na2SO4)
  5. customthe solvent evaporated in vacuo
  6. customto give a residue
  7. customThe residue was purified by chromatography on flash silica gel (40 mm diameter column)
  8. washElution with EtOAc-PE (1:1)

Sources & evidence

ORD record
ord-fff55165409a401187684c36fe80692d
Source dataset
uspto-grants-2010_08
Patent number
US07776895B2

Reaction notes

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