Sodium borohydride → 2-{4-[2-(2,6-Dichloro-phenyl)-4-isopropyl-2H-pyrazol-3-ylmethoxy]-2-methyl-phenyl}-propan-1-ol

HRID 2261752Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 2261752
[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([Cl:8])[C:3]=1[N:9]1[C:13]([CH2:14][O:15][C:16]2[CH:21]=[CH:20][C:19]([CH:22]([CH3:25])[CH:23]=[O:24])=[C:18]([CH3:26])[CH:17]=2)=[C:12]([CH:27]([CH3:29])[CH3:28])[CH:11]=[N:10]1.[BH4-].[Na+]>C1COCC1.CO>[Cl:1][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([Cl:8])[C:3]=1[N:9]1[C:13]([CH2:14][O:15][C:16]2[CH:21]=[CH:20][C:19]([CH:22]([CH3:25])[CH2:23][OH:24])=[C:18]([CH3:26])[CH:17]=2)=[C:12]([CH:27]([CH3:29])[CH3:28])[CH:11]=[N:10]1

Komponenten

5

Edukt 2

HCID 4311764Sodium borohydrideHCID 866354632-{4-[2-(2,6-Dichloro-phenyl)-4-isopropyl-2H-pyrazol-3-ylmethoxy]-2-methyl-phenyl}-propionaldehyde

Produkt 1

HCID 574432712-{4-[2-(2,6-Dichloro-phenyl)-4-isopropyl-2H-pyrazol-3-ylmethoxy]-2-methyl-phenyl}-propan-1-olAusbeute 95 %

Reagenzien, Katalysatoren, Lösungsmittel 2

HCID 887MethanolLösungsmittelHCID 8028TetrahydrofuranLösungsmittel

Versuchsvorschrift

To a 0° C. solution of 2-{4-[2-(2,6-Dichloro-phenyl)-4-isopropyl-2H-pyrazol-3-ylmethoxy]-2-methyl-phenyl}-propionaldehyde (753 mg, 1.74 mmol) in THF (17 mL) and MeOH (3 mL) is added sodium borohydride (198 mg, 5.23 mmol) portionwise. The reaction mixture is warmed to room temperature. After 2 h, the reaction is concentrated under reduced pressure and the residue is partitioned between Et2O (100 mL) and 1N HCl (30 mL). The aqueous layer is extracted with Et2O (100 mL) and the combined organic layers are washed with brine, dried (MgSO4), filtered, concentrated, and chromatographed (0% to 30% EtOAc/Hex) to yield the title compound (715 mg, 95%). 1H NMR (400 MHz, CDCl3) δ 7.71 (s, 1H), 7.43-7.40 (m, 2H), 7.33-7.28 (m, 1H), 7.04 (d, 1H, J=8.4 Hz), 6.64-6.58 (m, 2H), 4.79 (s, 2H), 3.68-3.63 (m, 2H), 3.14-3.16 (m, 1H), 2.99 (sept, 1H, J=7.0 Hz), 2.28 (s, 3H), 1.30 (d, 3H, J=7.0 Hz), 1.21 (d, 6H, J=7.0 Hz).

Aufarbeitung

  1. concentrationthe reaction is concentrated under reduced pressure
  2. customthe residue is partitioned between Et2O (100 mL) and 1N HCl (30 mL)
  3. extractionThe aqueous layer is extracted with Et2O (100 mL)
  4. washthe combined organic layers are washed with brine
  5. dry with materialdried (MgSO4)
  6. filtrationfiltered
  7. concentrationconcentrated
  8. customchromatographed (0% to 30% EtOAc/Hex)

Quellen und Nachweise

ORD-Eintrag
ord-a288c28e707e488188725f6954246034
Quelldatensatz
uspto-grants-2010_12
Patentnummer
US07846960B2

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