Butanal → Ethyl 4-(1-hydroxybutyl)benzoate

HRID 1892636Notes

Reaction equation

HRID 1892636 reaction equation
[Cl-].[Li+].C([Mg]Cl)(C)C.I[C:9]1[CH:19]=[CH:18][C:12]([C:13]([O:15][CH2:16][CH3:17])=[O:14])=[CH:11][CH:10]=1.[CH:20](=[O:24])[CH2:21][CH2:22][CH3:23]>O1CCCC1>[OH:24][CH:20]([C:9]1[CH:19]=[CH:18][C:12]([C:13]([O:15][CH2:16][CH3:17])=[O:14])=[CH:11][CH:10]=1)[CH2:21][CH2:22][CH3:23]

Participants

5

Reactant 3

HCID 261ButanalHCID 142891Ethyl 4-iodobenzoateHCID 178461733HCID 178461733, compound

Product 1

HCID 67981039Ethyl 4-(1-hydroxybutyl)benzoate

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Conditions

Temperature
-40 °C

Procedure

At −40° C., isopropylmagnesium chloride lithium chloride (15.3 mL, 1.3 M in THF, 19.9 mmol) was added dropwise to a solution of ethyl 4-iodobenzoate (5000 mg, 18.11 mmol) in tetrahydrofuran (30 mL). The solution was stirred at −40° C. for 40 minutes. Butyraldehyde (1830 mg, 25.4 mmol) was added. The mixture was allowed to warm to room temperature over 3 hours. The reaction was quenched with 1N HCl and extracted three times with ethyl acetate. The combined organic layers were dried over sodium sulfate, filtered and concentrated to give ethyl 4-(1-hydroxybutyl)benzoate. 1H NMR (400 MHz, CDCl3, δ): 8.02 (d, J=8.6 Hz, 2H), 7.41 (d, J=8.0 Hz, 2H), 4.83-4.66 (m, 1H), 4.38 (q, J=7.2 Hz, 2H), 1.86 (d, J=3.7 Hz, 1H), 1.83-1.61 (m, 2H), 1.51-1.42 (m, 1H), 1.39 (t, J=7.2 Hz, 3H), 1.36-1.23 (m, 1H), 0.94 (t, J=7.6 Hz, 3H).

Workup

  1. temperatureto warm to room temperature over 3 hours
  2. customThe reaction was quenched with 1N HCl
  3. extractionextracted three times with ethyl acetate
  4. dry with materialThe combined organic layers were dried over sodium sulfate
  5. filtrationfiltered
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-410945e3956742cca39a349f8192cb54
Source dataset
uspto-grants-2013_08
Patent number
US08507533B2

Reaction notes

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