Dimethyl Sulfoxide → Diallylacetic Acid Ethyl Ester

Temperatur

160 °C

A mixture of diethyl diallylmalonate (701; 50 g, 208 mmol), sodium cyanide (20.7 g, 422 mmol) and DMSO (166 mL) was heated at 160° C. for 6 h. After being cooled to r.t., the mixture was added to 400 mL of water and the product was extracted into hexane (4×100 mL). After evaporation of the solvent at reduced pressure, the residue was distilled (42-43° C./1 Torr) to give 27.34 g (78%) of 702 as a colorless liquid. 1H NMR (400 MHz, CDCl3) δ 5.80-5.70 (m, 2H, 2 CH═CH2), 5.10-5.02 (m, 4H, 2 CH═CH2), 4.14 (q, 2H, J=7.2 Hz, OCH2), 2.54-2.48 (m, 1H, CH), 2.41-2.34, 2.29-2.23 (2m, 4H, 2CH2), 1.25 (t, J=7.2 Hz, 3H, CH3).

1. temperatureAfter being cooled to r.t.
2. extractionthe product was extracted into hexane (4×100 mL)
3. customAfter evaporation of the solvent at reduced pressure
4. distillationthe residue was distilled (42-43° C./1 Torr)

ORD-Eintrag

ord-c5171f7de3ee4505b82cd91675132588

Quelldatensatz

uspto-grants-2012_05

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08168583B2