Acetonitrile → 3-(3-Bromophenyl)-3-hydroxypropanenitrile

Temperature

-78 °C

To a −78° C. solution of acetonitrile (1.05 mL, 20 mmol) in anhydrous THF (25 mL) under argon, was added lithium diisopropylamide (11 mL of a 2 M solution in THF, 22 mmol) dropwise. The resulting mixture was stirred at −78° C. for 15 min. A solution of 3-bromobenzaldehyde (7) (2.78 g, 15 mmol) in anhydrous THF (10 mL) was added dropwise. The reaction mixture was allowed to warm to room temperature, then concentrated under reduced pressure and diluted with EtOAc (75 mL). The solution was washed with water (50 mL) and brine (50 mL), dried over Na2SO4 and concentrated under reduced pressure. Purification by flash chromatography (20 to 100% EtOAc-hexanes gradient) gave 3-(3-bromophenyl)-3-hydroxypropanenitrile (120) as a light yellow oil. Yield (2.75 g, 81%): 1H NMR (400 MHz, DMSO-d6) δ 7.60 (t, J=1.6 Hz, 1H), 7.46 (ddd, J=7.6, 2.0, 1.2 Hz, 1H), 7.40 (dd, J=7.6, 2.0 Hz, 1H), 7.31 (t, J=7.6 Hz, 1H), 6.05 (d, J=4.8 Hz, 1H), 2.94-2.80 (m, 2H).

1. temperatureto warm to room temperature
2. concentrationconcentrated under reduced pressure
3. additiondiluted with EtOAc (75 mL)
4. washThe solution was washed with water (50 mL) and brine (50 mL)
5. dry with materialdried over Na2SO4
6. concentrationconcentrated under reduced pressure
7. customPurification by flash chromatography (20 to 100% EtOAc-hexanes gradient)

ORD record

ord-34631de880c24713bdc05cbc96969ffb

Source dataset

uspto-grants-2013_04

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08420863B2