Réaction #79478

Équation de réaction

triethylamine

m-aminophenol

1,4-dibromobutane

→

3-pyrrolidinylphenol

Rendement 32.2%

Solvants

toluene

Conditions de réaction

Traitement

1. 1
   Autretriturated with diethylether
2. 2
   workup.DISSOLUTIONThe residue was dissolved in ethyl acetate
3. 3
   Extractionextracted with 1M NaOH, water, and sat. NaCl
4. 4
   SéchageAfter drying the organic layer with MgSO4
5. 5
   Filtrationfiltering
6. 6
   Autreevaporating solvent under vacuum
7. 7
   Autrethe crude product was purified by silica gel chromatography
8. 8
   Autreto give a pale yellow solid
9. 9
   Températurecooled to room temperature
10. 10
    Lavagewashed with water and sat. NaCl
11. 11
    SéchageThe solution was dried again over MgSO4
12. 12
    Filtrationfiltered
13. 13
    Autreevaporated under vacuum

Mode opératoire

A solution of m-aminophenol (12.6 gm, 0.115 moles) and 1,4-dibromobutane (50 gm, 0.23 moles) was heated to 130° C. for 12 hr. The mixture was cooled to room temperature and triturated with diethylether and then ethyl acetate. The residue was dissolved in ethyl acetate and extracted with 1M NaOH, water, and sat. NaCl. After drying the organic layer with MgSO4, filtering, and evaporating solvent under vacuum, the crude product was purified by silica gel chromatography to give a pale yellow solid. The solid was refluxed with 500 ml toluene and 17 ml triethylamine (0.12 moles) for one hr, cooled to room temperature and washed with water and sat. NaCl. The solution was dried again over MgSO4, filtered, and evaporated under vacuum to give 3-pyrrolidinylphenol as a white solid (6.0 gm, 0.037 moles, 32%).

Source