Allyl bromide → HCID 10773123, compound

Temperature

80 °C

3-Amino-4-pyrazolecarbonitrile 1 (Acros, 1.08 g, 10.0 mmol), allylbromide (Acros, 1.45 g, 12 mmol) and anhydrous potassium carbonate (Fisher, 1.65 g, 12 mmol) were suspended in 10 mL anhydrous DMF and heated at 80° C. under argon overnight. The solution was concentrated. Water was added (100 mL) and the organics were extracted with dichloromethane (3×100 mL). The combined dichloromethane fractions were washed with water (50 mL) and brine (50 mL) and were dried (magnesium sulfate). Concentration of the organics afforded a solid which was subjected to flash chromatography on silica gel (gradient elution 2:1 to 3:2 hexane: ethyl acetate). 589 mg (40%) of a white solid was obtained which was seen by NMR to contain an inseparable mixture of 5 and 6 in a 2.1:1 ratio. This mixture was used without further purification.

1. concentrationThe solution was concentrated
2. additionWater was added (100 mL)
3. extractionthe organics were extracted with dichloromethane (3×100 mL)
4. washThe combined dichloromethane fractions were washed with water (50 mL) and brine (50 mL)
5. dry with materialwere dried (magnesium sulfate)
6. customConcentration of the organics afforded a solid which

ORD record

ord-106de23393f9449a959ca2eacfd8058e

Source dataset

uspto-grants-2010_12

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07851468B2