Acetic Acid → Dimethyl [3-(3-chlorophenyl)-2-oxopropyl]phosphonate

HRID 459002

Reaktionsgleichung

Reaktionsgleichung von HRID 459002
[CH3:1][P:2](=[O:7])([O:5][CH3:6])[O:3][CH3:4].[Li]CCCC.C[O:14][C:15](=O)[CH2:16][C:17]1[CH:22]=[CH:21][CH:20]=[C:19]([Cl:23])[CH:18]=1.C(O)(=O)C>C1COCC1>[CH3:4][O:3][P:2]([CH2:1][C:15](=[O:14])[CH2:16][C:17]1[CH:22]=[CH:21][CH:20]=[C:19]([Cl:23])[CH:18]=1)(=[O:7])[O:5][CH3:6]

Komponenten

6

Edukt 4

HCID 176Acetic AcidHCID 12958Dimethyl methylphosphonateHCID 2733544Methyl 2-(3-chlorophenyl)acetateHCID 178418339Butyllithium

Produkt 1

HCID 12989750Dimethyl [3-(3-chlorophenyl)-2-oxopropyl]phosphonateAusbeute 23,3 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

To a solution of dimethyl methylphosphonate (17.93 g, 144 mmol) in THF (270 mL) at −78° C. was slowly added n-BuLi (2.5M, 64.2 mL, 160.6 mmol). The reaction mixture was stirred for 1 h and (3-chloro-phenyl)-acetic acid methyl ester (26.93 g, 146 mmol) was slowly added. The reaction mixture was allowed to warm to room temperature and was stirred for 24 h. Acetic acid (15 mL) was added and the volatiles were removed in vacuo. The residue was diluted with CH2Cl2 and the organic solution was washed carefully with saturated aqueous NaHCO3 (3 times). The organic layer was dried (MgSO4), filtered and concentrated in vacuo. Purification by medium pressure chromatography (20% EtOAc in hexanes to EtOAc) provided the title compound (9.28 g).

Aufarbeitung

  1. customat −78° C.
  2. stirringwas stirred for 24 h
  3. customthe volatiles were removed in vacuo
  4. additionThe residue was diluted with CH2Cl2
  5. washthe organic solution was washed carefully with saturated aqueous NaHCO3 (3 times)
  6. dry with materialThe organic layer was dried (MgSO4)
  7. filtrationfiltered
  8. concentrationconcentrated in vacuo
  9. customPurification by medium pressure chromatography (20% EtOAc in hexanes to EtOAc)

Quellen und Nachweise

ORD-Eintrag
ord-2a19f2ecff17431880410c53b34f053b
Quelldatensatz
uspto-grants-2007_03
Patentnummer
US07192979B2

Verknüpfte Notizen

Wird geladen…