Hydrochloric Acid → (E)-3-Cyclopentylacrylic acid

Temperatur

40 °C

To a solution of malonic acid (1.06 g, 10.2 mol) in pyridine (1.25 mL) was added piperidine (0.15 mL) and cyclopentanecarbaldehyde (1.00 g, 10.2 mmol). The mixture was heated to 40° C. for 2 hours, followed by stirring at room temperature for 16 hours. The mixture was then cooled in an ice bath and 2N HCl was added to acidify. The product was extracted with ether. The ether extract was washed with aq. HCl and brine, dried over sodium sulfate, filtered, and the solvent was removed in vacuo to afford the product (1.30 g, 77%), which was used without further purification.

1. temperatureThe mixture was then cooled in an ice bath
2. extractionThe product was extracted with ether
3. extractionThe ether extract
4. washwas washed with aq. HCl and brine
5. dry with materialdried over sodium sulfate
6. filtrationfiltered
7. customthe solvent was removed in vacuo

ORD-Eintrag

ord-7514952082aa4690a649a793d88fb62a

Quelldatensatz

uspto-grants-2013_09

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US08530485B2