Hydrochloric Acid → 2-[5-(3,5-Dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]thieno[2,3-b]pyridine-5-carboxylic acid

HRID 240890Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 240890
O[Li].O.[Cl:4][C:5]1[CH:6]=[C:7]([C:12]2([C:30]([F:33])([F:32])[F:31])[O:16][N:15]=[C:14]([C:17]3[S:29][C:20]4=[N:21][CH:22]=[C:23]([C:25]([O:27]C)=[O:26])[CH:24]=[C:19]4[CH:18]=3)[CH2:13]2)[CH:8]=[C:9]([Cl:11])[CH:10]=1.Cl>O.C1COCC1>[Cl:11][C:9]1[CH:8]=[C:7]([C:12]2([C:30]([F:32])([F:31])[F:33])[O:16][N:15]=[C:14]([C:17]3[S:29][C:20]4=[N:21][CH:22]=[C:23]([C:25]([OH:27])=[O:26])[CH:24]=[C:19]4[CH:18]=3)[CH2:13]2)[CH:6]=[C:5]([Cl:4])[CH:10]=1

Komponenten

6

Edukt 3

HCID 313Hydrochloric AcidHCID 168937Lithium hydroxide, monohydrateHCID 71469063Methyl 2-(5-(3,5-dichlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazol-3-yl)thieno[2,3-b]pyri dine-5-carboxylate

Produkt 1

HCID 714691762-[5-(3,5-Dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]thieno[2,3-b]pyridine-5-carboxylic acidAusbeute 73,9 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 962WaterLösungsmittel2×HCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

Add a solution of LiOH—H2O (76 mg, 2 mmol) in water (0.5 mL) to a solution of methyl 2-(5-(3,5-dichlorophenyl)-5-(trifluoromethyl)-4,5-dihydroisoxazol-3-yl)thieno[2,3-b]pyri dine-5-carboxylate (237 mg, 0.5 mmol) in THF (3 mL). Stir the mixture at temperature for 12 hours. After addition of 10 mL of water, acidify the mixture with concentrated HCl to PH=6˜7. Extract the resultant mixture with ethyl acetate (3×10 mL). The combined organic layers are washed brine, dried over anhydrous Na2SO4 and concentrated under vacuum to afford 2-[5-(3,5-Dichloro-phenyl)-5-trifluoromethyl-4,5-dihydro-isoxazol-3-yl]-thieno[2,3-b]pyridine-5-carboxylic acid as pale yellow solid (170 mg, 73.9%), which is used in next step without further purification. MS (m/z): 461 (M+1).

Aufarbeitung

  1. extractionExtract the resultant mixture with ethyl acetate (3×10 mL)
  2. washThe combined organic layers are washed brine
  3. dry with materialdried over anhydrous Na2SO4
  4. concentrationconcentrated under vacuum

Quellen und Nachweise

ORD-Eintrag
ord-bdaba8d7e780490e92690b67b0608e30
Quelldatensatz
uspto-grants-2014_02
Patentnummer
US08648081B2

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