Hydrochloric Acid → 1,3-Diethyl 2-(1-oxopropyl)propanedioate

To magnesium chloride (2.96 g, 31.2 mmol) was added dry acetonitrile (5 mL) and the mixture was then cooled in ice and treated with diethyl malonate (5 g, 31.2 mmol). Once the mixture was cold, triethylamine (8.6 mL, 62.5 mmol) was added and the resulting suspension was stirred for 15 min. Propionyl chloride (2.71 mL, 31.2 mmol) was added dropwise and the mixture was stirred at 0° C. for 1.5 h and at ambient temperature for 5 h. The mixture was cooled in an ice-bath and treated with aqueous hydrochloric acid (2M, 10 mL) and the product extracted with ether. The organic phase was washed with water then brine, dried and concentrated to afford 6.31 g of a yellow oil. This was dissolved in ether and washed with aqueous hydrochloric acid (2M) then brine, dried and concentrated to afford 5.93 g of the title compound.

1. temperaturethe mixture was then cooled in ice
2. stirringthe mixture was stirred at 0° C. for 1.5 h and at ambient temperature for 5 h
3. temperatureThe mixture was cooled in an ice-bath
4. extractionthe product extracted with ether
5. washThe organic phase was washed with water
6. dry with materialbrine, dried
7. concentrationconcentrated

ORD record

ord-dd02f94fce664cea940a5b0d1adca8f8

Source dataset

uspto-grants-2011_11

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US08067408B2