Triphenylphosphine → 4-Chloro-3-[2-(2,4-dichloro-phenyl)-ethoxy]-benzoic Acid Methyl Ester

HRID 1831812Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1831812
[CH3:1][O:2][C:3](=[O:12])[C:4]1[CH:9]=[CH:8][C:7]([Cl:10])=[C:6]([OH:11])[CH:5]=1.[Cl:13][C:14]1[CH:19]=[C:18]([Cl:20])[CH:17]=[CH:16][C:15]=1[CH2:21][CH2:22]O.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.CCOC(/N=N/C(OCC)=O)=O>O1CCCC1>[CH3:1][O:2][C:3](=[O:12])[C:4]1[CH:9]=[CH:8][C:7]([Cl:10])=[C:6]([O:11][CH2:22][CH2:21][C:15]2[CH:16]=[CH:17][C:18]([Cl:20])=[CH:19][C:14]=2[Cl:13])[CH:5]=1

Komponenten

6

Edukt 4

HCID 11776TriphenylphosphineHCID 27340992,4-Dichlorophenethyl alcoholHCID 5462977Diethyl azodicarboxylateHCID 11819787Methyl 4-chloro-3-hydroxybenzoate

Produkt 1

HCID 696522874-Chloro-3-[2-(2,4-dichloro-phenyl)-ethoxy]-benzoic Acid Methyl Ester

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

2.0 g (10.72 mmol) of 4-Chloro-3-hydroxy-benzoic acid methyl ester was dissolved in 20 ml of anhydrous tetrahydrofuran. To this solution was added 2.25 g (11.79 mmol) of 2-(2,4-Dichlorophenyl)-ethanol, 10.71 g (equivalent to 32.2 mmol PPh3) of triphenylphosphine derivatized polystyrene and 5.6 g (32.2 mmol) of DEAD. The solution was shaken for 16 h at RT. The polymer was filtered off and washed with ethyl acetate. The solvent was removed under reduced pressure. The residue was taken-up in ethyl acetate and the solution was washed three times with water and twice with saturated aqueous sodium chloride. The organic phase was dried with magnesium sulphate, filtered and the solvent was removed under reduced pressure. The residue was chromatographed on silica gel eluting with ethyl acetate/n-heptane (1/6).

Aufarbeitung

  1. filtrationThe polymer was filtered off
  2. washwashed with ethyl acetate
  3. customThe solvent was removed under reduced pressure
  4. washthe solution was washed three times with water
  5. dry with materialThe organic phase was dried with magnesium sulphate
  6. filtrationfiltered
  7. customthe solvent was removed under reduced pressure
  8. customThe residue was chromatographed on silica gel eluting with ethyl acetate/n-heptane (1/6)

Quellen und Nachweise

ORD-Eintrag
ord-c10d2f30aacc4470976dcd5c2f89ffcf
Quelldatensatz
uspto-grants-2006_06
Patentnummer
US07067665B2

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