Methylparaben → Methyl[4-(3,7-dimethyl-1-octyloxy)]benzoate

Temperatur

70 °C

Under an argon atmosphere, potassium carbonate (12.5 g, 90.3 mmol) was suspended in anhydrous N,N-dimethylformamide (100 ml), 1-bromo-3,7-dimethyloctane (13.3 g, 60.1 mmol) and methyl (4-hydroxy)benzoate (8.74 g, 57.4 mmol) were added, and the mixture was stirred at 70° C. for 16 hr. The reaction mixture was filtered to remove potassium carbonate. Water (50 ml) was added and the mixture was extracted with hexane (250 ml). The extract was washed successively with 1.0 mol/l aqueous hydrochloric acid solution (100 ml), aqueous sodium hydrogen carbonate solution (100 ml) and saturated brine (100 ml). The obtained organic layer was dried over sodium sulfate, filtered and concentrated under reduced pressure to give the title compound (16.1 g, 95.7%) as a colorless oil.

1. filtrationThe reaction mixture was filtered
2. customto remove potassium carbonate
3. additionWater (50 ml) was added
4. extractionthe mixture was extracted with hexane (250 ml)
5. washThe extract was washed successively with 1.0 mol/l aqueous hydrochloric acid solution (100 ml), aqueous sodium hydrogen carbonate solution (100 ml) and saturated brine (100 ml)
6. dry with materialThe obtained organic layer was dried over sodium sulfate
7. filtrationfiltered
8. concentrationconcentrated under reduced pressure

ORD-Eintrag

ord-65360ee7852e48328f35d1435f7a53eb

Quelldatensatz

uspto-grants-2014_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08846885B2