Hydrochloric Acid → HCID 14787257, compound

A solution of ethyl cyanoacetate (17.0 g, 150 mmol), magnesium chloride (14.4 g, 151 mmol) and triethylamine (42 mL, 301 mmol) in acetonitrile (150 mL) was stirred at 0° C. for 15 minutes. To the solution, propionyl chloride (13.8 g, 150 mmol) was added dropwise over 15 minutes at the same temperature, and subsequently the solution was allowed to warm to room temperature and stirred for 24 hours. After addition of 30% hydrochloric acid (100 mL), the organic matter was extracted with diethylether. The extract was washed with saturated brine and dried over anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure to give crude ethyl 2-cyano-3-oxopentanoate (24.6 g, 97% yield). The compound (25.4 g, 150 mmol) was dissolved in a mixed solvent of dimethylsulfoxide (50 mL) and water (5 mL), and the solution was stirred at 120° C. for 1.5 hours. The solution was allowed to cool to room temperature and poured into saturated brine, and the organic matter was extracted with dichloromethane. The extract was washed with saturated brine and dried over anhydrous magnesium sulfate, and the solvents were evaporated under reduced pressure to give the title compound (14.6 g, quantitative).

1. extractionthe organic matter was extracted with diethylether
2. washThe extract was washed with saturated brine
3. dry with materialdried over anhydrous magnesium sulfate
4. customthe solvent was evaporated under reduced pressure

ORD record

ord-b5a1ed287cfe42c2b3a8867db31352fc

Source dataset

uspto-grants-2005_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US06949648B2