Methanol → 4-[5-(3,5-Dichlorophenyl)-4,5-dihydro-5-(trifluoromethyl)-3-isoxazolyl]-1-naphthalenecarboxylic acid

HRID 541083Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 541083
[Cl:1][C:2]1[CH:3]=[C:4]([C:9]2([C:28]([F:31])([F:30])[F:29])[O:13][N:12]=[C:11]([C:14]3[C:23]4[C:18](=[CH:19][CH:20]=[CH:21][CH:22]=4)[C:17]([C:24]([O:26]C)=[O:25])=[CH:16][CH:15]=3)[CH2:10]2)[CH:5]=[C:6]([Cl:8])[CH:7]=1.O.[OH-].[Li+].CO>O1CCCC1.O>[Cl:1][C:2]1[CH:3]=[C:4]([C:9]2([C:28]([F:30])([F:29])[F:31])[O:13][N:12]=[C:11]([C:14]3[C:23]4[C:18](=[CH:19][CH:20]=[CH:21][CH:22]=4)[C:17]([C:24]([OH:26])=[O:25])=[CH:16][CH:15]=3)[CH2:10]2)[CH:5]=[C:6]([Cl:8])[CH:7]=1

Komponenten

6

Edukt 3

HCID 887MethanolHCID 168937Lithium hydroxide, monohydrateHCID 58338637Methyl 4-[5-(3,5-dichlorophenyl)-4,5-dihydro-5-(trifluoromethyl)-3-isoxazolyl]-1-naphthalenecarboxylate2×

Produkt 1

HCID 583386304-[5-(3,5-Dichlorophenyl)-4,5-dihydro-5-(trifluoromethyl)-3-isoxazolyl]-1-naphthalenecarboxylic acid

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

To a stirred solution of methyl 4-[5-(3,5-dichlorophenyl)-4,5-dihydro-5-(trifluoromethyl)-3-isoxazolyl]-1-naphthalenecarboxylate (i.e. the product from Step C) (650 mg, 1.39 mmol) in tetrahydrofuran (10 mL) was added a solution of lithium hydroxide monohydrate (350 mg, 8.34 mmol) in water (10 mL), followed by methanol (10 mL). The resulting mixture was stirred overnight at room temperature. The reaction mixture was partitioned between water and diethyl ether. Then the aqueous layer was acidified with 6 N aqueous hydrochloric acid to pH 2 and extracted with ethyl acetate. The combined organic layers were washed with brine, dried and concentrated to provide the title compound as a white solid (450 mg).

Aufarbeitung

  1. customThe reaction mixture was partitioned between water and diethyl ether
  2. extractionextracted with ethyl acetate
  3. washThe combined organic layers were washed with brine
  4. customdried
  5. concentrationconcentrated

Quellen und Nachweise

ORD-Eintrag
ord-9f2ae6c05436492daeb839fe9d397eb9
Quelldatensatz
uspto-grants-2014_10
Patentnummer
US08871941B2

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