Methyl 4-Formylbenzoate → HCID 10443031, compound

HRID 1520807Notes

Reaction equation

HRID 1520807 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-af5845c82ee9497ba2aa93ead5966b63
Source dataset
uspto-grants-2015_07
Patent number
US09073871B2

Reaction notes

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