Urea → Glutarimide, 2,2-dimethyl-

Temperatur

160 °C

The mixture of 10 g of 2,2-dimethylglutaric acid and 37.5 g of urea was stirred for 8 hours at 160° C. Into the reaction mixture was added water at 100° C., and the mixture was cooled to near room temperature. The mixture was extracted with ethyl acetate three times. The organic layers were washed with a saturated sodium chloride aqueous solution, dried over anhydrous magnesium sulfate and concentrated. The residue was subjected to silica gel column chromatography to obtain 7.6 g of 3,3-dimethylpiperidin-2,6-dione.

1. temperaturethe mixture was cooled to near room temperature
2. extractionThe mixture was extracted with ethyl acetate three times
3. washThe organic layers were washed with a saturated sodium chloride aqueous solution
4. dry with materialdried over anhydrous magnesium sulfate
5. concentrationconcentrated

ORD-Eintrag

ord-839758e16358461ea01e3ad93e9d6318

Quelldatensatz

uspto-grants-2010_06

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07732448B2