Water → ethyl 2-[1-benzyl-5-(3,4-dihydro-2H-1-benzopyran-6-yl)-3-(trifluoromethyl)-1H-pyrazol-4-yl]-2-hydroxyacetate

HRID 591079Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 591079
[BH4-].[Na+].[CH2:3]([N:10]1[C:14]([C:15]2[CH:16]=[CH:17][C:18]3[O:23][CH2:22][CH2:21][CH2:20][C:19]=3[CH:24]=2)=[C:13]([C:25](=[O:31])[C:26]([O:28][CH2:29][CH3:30])=[O:27])[C:12]([C:32]([F:35])([F:34])[F:33])=[N:11]1)[C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1.O>CO>[CH2:3]([N:10]1[C:14]([C:15]2[CH:16]=[CH:17][C:18]3[O:23][CH2:22][CH2:21][CH2:20][C:19]=3[CH:24]=2)=[C:13]([CH:25]([OH:31])[C:26]([O:28][CH2:29][CH3:30])=[O:27])[C:12]([C:32]([F:33])([F:35])[F:34])=[N:11]1)[C:4]1[CH:5]=[CH:6][CH:7]=[CH:8][CH:9]=1

Komponenten

5

Edukt 3

HCID 962WaterHCID 4311764Sodium borohydrideHCID 70855456ethyl 2-[1-benzyl-5-(3,4-dihydro-2H-1-benzopyran-6-yl)-3-(trifluoromethyl)-1H-pyrazol-4-yl]-2-oxoacetate

Produkt 1

HCID 70855451ethyl 2-[1-benzyl-5-(3,4-dihydro-2H-1-benzopyran-6-yl)-3-(trifluoromethyl)-1H-pyrazol-4-yl]-2-hydroxyacetateAusbeute 100 %

Reagenzien, Katalysatoren, Lösungsmittel 1

HCID 887MethanolLösungsmittel

Versuchsvorschrift

Under a nitrogen atmosphere, sodium borohydride (6.44 mg, 0.17 mmol) was added portionwise to a solution of ethyl 2-[1-benzyl-5-(3,4-dihydro-2H-1-benzopyran-6-yl)-3-(trifluoromethyl)-1H-pyrazol-4-yl]-2-oxoacetate (49e) (78 mg, 0.17 mmol) in anhydrous methanol (2 mL). After 2 hours stirring, water was added (3 mL). The methanol was removed under reduced pressure, and the aqueous layer was extracted with ethyl acetate (2×5 mL). The organic layer was successively washed with water (3 mL) and brine (3 mL), before being dried over sodium sulfate and concentrated in vacuo to provide the desired alcohol (49f) (70 mg, 0.17 mmol, 89%) which was used without further purification.

Aufarbeitung

  1. customThe methanol was removed under reduced pressure
  2. extractionthe aqueous layer was extracted with ethyl acetate (2×5 mL)
  3. washThe organic layer was successively washed with water (3 mL) and brine (3 mL)
  4. dry with materialbefore being dried over sodium sulfate
  5. concentrationconcentrated in vacuo

Quellen und Nachweise

ORD-Eintrag
ord-e8f97823ec0341a18c1b25fdf60985a2
Quelldatensatz
uspto-grants-2016_01
Patentnummer
US09238026B2

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