Hydrochloric Acid → 2-Chloro-3,6-difluoro-α-methylbenzenemethanol

Temperatur

0 °C

2-Chloro-3,6-difluorobenzaldehyde (1.0 molar equivalent) was dissolved in THF (0.2M) and stirred at 0° C. for 5 min. The corresponding methylmagnesium chloride solution (1.1 molar equivalent) was added The reaction was warmed up gradually to ambient temperature and stirred for 2 hr. Methanol, and 1N HCl was added to the mixture and diluted with ethyl acetate. The mixture was washed with water, brine, dried over MgSO4, filtered, and concentrated to give 1-(2-chloro-3,6-difluoro-phenyl)-ethanol as oil. 1H NMR (400 MHz, DMSO-d6) δ 1.42 (d, 3H), 5.21 (m, 1H), 5.42 (m, 1H), 7.09 (m, 1H), 7.18 (m, 1H).

1. temperaturewas warmed up gradually to ambient temperature
2. stirringstirred for 2 hr
3. washThe mixture was washed with water, brine
4. dry with materialdried over MgSO4
5. filtrationfiltered
6. concentrationconcentrated

ORD-Eintrag

ord-1d37623349d3424b972c8d2d4ebcbc3e

Quelldatensatz

uspto-grants-2012_01

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08106197B2