Methanol → 2-(Difluoromethoxy)phenylacetonitrile

Temperature

-55 °C

A solution of p-toluenesulfonylmethyl isocyanide (2.4 g) in dimethoxyethane (10 mL) was added to a solution of potassium tert-butoxide (2.68 g) in dimethoxyethane (30 mL) at −35° C., and the reaction solution was stirred at the same temperature for 10 minutes. The reaction solution was cooled to −55° C. A solution of difluoromethoxybenzaldehyde (2 g) in dimethoxyethane (5 mL) was added dropwise, and the reaction solution was stirred at the same temperature for two hours. 10 mL of methanol was added to the reaction solution, and the reaction solution was heated under reflux for 15 minutes. The reaction solution was left to cool to room temperature. Then, water and dichloromethane were added and the organic layer was separated. The resulting organic layer was dried over anhydrous magnesium sulfate and then concentrated under reduced pressure. The residue was purified by silica gel column chromatography (elution solvent: heptane-ethyl acetate system) to obtain 1.45 g of the title compound. The property values of the compound are as follows.

1. stirringthe reaction solution was stirred at the same temperature for two hours
2. temperaturethe reaction solution was heated
3. temperatureunder reflux for 15 minutes
4. waitThe reaction solution was left
5. temperatureto cool to room temperature
6. customthe organic layer was separated
7. dry with materialThe resulting organic layer was dried over anhydrous magnesium sulfate
8. concentrationconcentrated under reduced pressure
9. customThe residue was purified by silica gel column chromatography (elution solvent: heptane-ethyl acetate system)

ORD record

ord-e38dbd4981154261bcde7f7598a2d8fa

Source dataset

uspto-grants-2011_05

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07935815B2