Methyl 4-Formylbenzoate → HCID 10443031, compound

HRID 1892647Notes

Reaction equation

HRID 1892647 reaction equation
[CH:1]([C:3]1[CH:12]=[CH:11][C:6]([C:7]([O:9][CH3:10])=[O:8])=[CH:5][CH:4]=1)=[O:2].[CH2:13]([Mg]Br)[CH2:14][CH3:15]>O1CCCC1>[OH:2][CH:1]([C:3]1[CH:12]=[CH:11][C:6]([C:7]([O:9][CH3:10])=[O:8])=[CH:5][CH:4]=1)[CH2:13][CH2:14][CH3:15]

Participants

4

Reactant 2

HCID 15294Methyl 4-FormylbenzoateHCID 178455851HCID 178455851, compound

Product 1

HCID 10443031HCID 10443031, compoundYield 47%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
0 °C

Procedure

A solution of methyl 4-formylbenzoate (2.092 g, 12.74 mmol) in tetrahydrofuran (50 mL) was cooled to 0° C. To this solution was added n-propylmagnesium bromide (6.4 mL, 2.0M in THF) dropwise over 20 minutes. The reaction was stirred at 0° C. for 2 hours. The reaction was then quenched by addition of saturated ammonium chloride. This mixture was extracted with ethyl acetate twice. The organics were dried over magnesium sulfate, filtered and concentrated. Purification by column chromatography (0-40% ethyl acetate in heptanes) gave (+/−)-methyl 4-(1-hydroxybutyl)benzoate (1.252 g, 47%) as a colorless oil. 1H NMR (400 MHz, CDCl3, δ): 7.97-8.02 (m, 2H), 7.40 (d, J=8.4 Hz, 2H), 4.74 (dd, J=7.8, 5.7 Hz, 1H), 3.90 (s, 3H), 1.61-1.82 (m, 2H), 1.23-1.49 (m, 2H), 0.92 (t, J=7.32 Hz, 3H).

Workup

  1. customThe reaction was then quenched by addition of saturated ammonium chloride
  2. extractionThis mixture was extracted with ethyl acetate twice
  3. dry with materialThe organics were dried over magnesium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customPurification by column chromatography (0-40% ethyl acetate in heptanes)

Sources & evidence

ORD record
ord-6d272b1aea514422bb25f215cb30de56
Source dataset
uspto-grants-2013_08
Patent number
US08507533B2

Reaction notes

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