Sodium borohydride → 1-(5-Bromo-2-chlorophenyl)ethanol

Sodium borohydride (1.182 g, 51.4 mmol) was added to a stirred solution of 1-(5-bromo-2-chlorophenyl)ethanone (10 g, 42.8 mmol) in methanol at 0° C. The resulting bubbling white mixture was allowed to warm to ambient temperature and stirred for 2 h. The reaction mixture was quenched with acetone (50 mL) and concentrated by rotary evaporation. The residue was partitioned between ethyl acetate and water. The organic phase was dried and concentrated to yield the title compound (10 g, 99% yield) as a white solid: 1H NMR (CDCl3) δ 7.75 (d, 1H), 7.32 (m, 1H), 7.19 (m, 1H), 5.23 (q, 1H), 1.95 (d, 1H), 1.48 (d, 3H).

1. customThe resulting bubbling white mixture
2. customThe reaction mixture was quenched with acetone (50 mL)
3. concentrationconcentrated by rotary evaporation
4. customThe residue was partitioned between ethyl acetate and water
5. customThe organic phase was dried
6. concentrationconcentrated

ORD record

ord-fa53a66b553842db98aa096d79ab48cd

Source dataset

uspto-grants-2010_08

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07786044B2