Triphenylphosphine → HCID 66681070, compound

HRID 1964521Notes

Reaction equation

HRID 1964521 reaction equation
[Br:1][C:2]1[CH:3]=[C:4]([OH:19])[CH:5]=[C:6]([O:8][C:9]2[CH:14]=[CH:13][C:12]([S:15]([CH3:18])(=[O:17])=[O:16])=[CH:11][CH:10]=2)[CH:7]=1.[CH3:20][O:21][CH2:22][C@H:23](O)[CH3:24].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>C1(C)C=CC=CC=1.C(OCC)(=O)C.O>[Br:1][C:2]1[CH:7]=[C:6]([O:8][C:9]2[CH:10]=[CH:11][C:12]([S:15]([CH3:18])(=[O:16])=[O:17])=[CH:13][CH:14]=2)[CH:5]=[C:4]([O:19][C@@H:23]([CH3:24])[CH2:22][O:21][CH3:20])[CH:3]=1

Participants

8

Reactant 4

HCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 2733589(R)-(-)-1-Methoxy-2-propanolHCID 66681634HCID 66681634, compound

Product 1

HCID 66681070HCID 66681070, compoundYield 86%

Reagents, catalysts & solvents 3

HCID 962WaterSolventHCID 1140TolueneSolventHCID 8857Ethyl AcetateSolvent

Conditions

Temperature
0 °C

Procedure

3-Bromo-5-[4-(methylsulfonyl)phenoxy]phenol (4.86 g, 14.2 mmol) synthesized in Example (1c) was dissolved in toluene (100 mL), and (R)-(−)-1-methoxy-2-propanol (1.77 mL, 18.1 mmol) and triphenylphosphine (4.10 g, 15.6 mmol) were added, followed by cooling to 0° C. Under nitrogen atmosphere, diethyl azodicarboxylate (40% toluene solution, 7.75 mL, 17.1 mmol) was added dropwise over 10 minutes and stirring was carried out at 0° C. for 30 minutes, followed by raising the temperature naturally and stirring at room temperature overnight. Water (100 mL) and ethyl acetate (100 mL) were added, and the solution was separated. The organic layer was washed with saturated brine, and subsequently dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure, and the resulting residue was purified using silica gel column chromatography (elution solvent: ethyl acetate/hexane=20%-40%) to afford the desired compound (5.06 g, yield 86%) as a pale yellow oil.

Workup

  1. temperatureby raising the temperature naturally
  2. stirringstirring at room temperature overnight
  3. customthe solution was separated
  4. washThe organic layer was washed with saturated brine
  5. dry with materialsubsequently dried over anhydrous magnesium sulfate
  6. distillationThe solvent was distilled off under reduced pressure
  7. customthe resulting residue was purified
  8. washsilica gel column chromatography (elution solvent: ethyl acetate/hexane=20%-40%)

Sources & evidence

ORD record
ord-60461cc1161442b585a15627126c4963
Source dataset
uspto-grants-2013_04
Patent number
US08415359B2

Reaction notes

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