Tetraethylammonium tetrahydroborate → Methyl 2-(2-hydroxypropan-2-yl)-6-(4-methylphenyl)pyridine-4-carboxylate

HRID 1909128Notizen

Reaktionsgleichung

Reaktionsgleichung von HRID 1909128
[CH3:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[CH:13]=[C:12]([C:14]([O:16][CH3:17])=[O:15])[CH:11]=[C:10]([C:18]([CH3:20])=[CH2:19])[N:9]=2)=[CH:4][CH:3]=1.[BH4-].C([N+](CC)(CC)CC)C.C([O-])(O)=[O:32].[Na+]>CO.COCCOC.O>[OH:32][C:18]([C:10]1[CH:11]=[C:12]([C:14]([O:16][CH3:17])=[O:15])[CH:13]=[C:8]([C:5]2[CH:6]=[CH:7][C:2]([CH3:1])=[CH:3][CH:4]=2)[N:9]=1)([CH3:20])[CH3:19]

Komponenten

7

Edukt 3

HCID 28251Tetraethylammonium tetrahydroborateHCID 516892Sodium BicarbonateHCID 67339741Methyl 2-(4-methylphenyl)-6-(prop-1-en-2-yl)pyridine-4-carboxylate

Produkt 1

HCID 67339432Methyl 2-(2-hydroxypropan-2-yl)-6-(4-methylphenyl)pyridine-4-carboxylate

Reagenzien, Katalysatoren, Lösungsmittel 3

HCID 887MethanolLösungsmittelHCID 962WaterLösungsmittelHCID 80711,2-DimethoxyethaneLösungsmittel

Versuchsvorschrift

To a solution of methyl 2-(4-methylphenyl)-6-(prop-1-en-2-yl)pyridine-4-carboxylate (191 mg, 0.71 mmol) in methanol (3.6 mL) and DME (3.6 mL) was added cobalt(II)mesotetraphenylporphine (2.4 mg, 3.6 mop. After 30 min, tetraethylammonium borohydride (170 mg, 1.17 mmol) was added in 3 portions over 1 h. Saturated aqueous NaHCO3 was added. The mixture was diluted with water and extracted with ethyl acetate (3×). The combined organic extracts were washed with brine, dried over magnesium sulfate, filtered and concentrated. Purification by reverse phase chromatography (C-18, 90% water/acetonitrile→5% water/acetonitrile with 0.1% trifluoroacetic acid) gave the title compound (165 mg). MS 286.1 (M+1).

Aufarbeitung

  1. extractionextracted with ethyl acetate (3×)
  2. washThe combined organic extracts were washed with brine
  3. dry with materialdried over magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customPurification by reverse phase chromatography (C-18, 90% water/acetonitrile→5% water/acetonitrile with 0.1% trifluoroacetic acid)

Quellen und Nachweise

ORD-Eintrag
ord-3240b01d78964a7f9c81768f8054afd4
Quelldatensatz
uspto-grants-2013_12
Patentnummer
US08598209B2

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