4'-Hydroxyacetophenone → 1-{4-[2-(4-Chlorophenyl)ethoxy]phenyl}ethanone

Temperatur

80 °C

To a stirred solution of 4′-hydroxyacetophenone (4 mmol) in DMF (10 mL) at rt, solid potassium carbonate (12.0 mmol) was added. 4-chlorophenthoxy mesylate (prepared from the 4-chlorophenethanol and methanesulfonyl chloride) (4.4 mmol) was added to the reaction mixture and heated to 80° C. until completion according to General Procedure Q1, as indicated by TLC or HPLC. After cooling to rt, the reaction mixture was quenched with saturated sodium bicarbonate. The aqueous layer was poured into EtOAc (30 ml) and washed with water (2×15 ml) and brine (15 ml). The organic layer was dried over magnesium sulfate, and the solvent was removed in vacuuo to afford the desired 1-{4-[2-(4-chlorophenyl)ethoxy]phenyl}ethanone. The crude alkylated product was purified by silica gel chromatography and the pure product obtained from 10% EtOAc/hexanes (yield 70%).

1. additionwas added to the reaction mixture
2. temperatureAfter cooling to rt
3. customthe reaction mixture was quenched with saturated sodium bicarbonate
4. additionThe aqueous layer was poured into EtOAc (30 ml)
5. washwashed with water (2×15 ml) and brine (15 ml)
6. dry with materialThe organic layer was dried over magnesium sulfate
7. customthe solvent was removed in vacuuo

ORD-Eintrag

ord-f910c620afc64b38affa936fd74b7d20

Quelldatensatz

uspto-grants-2010_06

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07737285B2