Hydrogen Peroxide → 2-Allyloctanoic acid

An aqueous solution of hydrogen peroxide (31% by weight; 0.5 ml, 55.0 mmol) and 0.043 g (1.0 mmol) of lithium hydroxide monohydrate were added dropwise to a solution of 0.20 g (0.50 mmol) of N-ethyloxycarbonyl-N-(2-allyloctanoyl)-(R)-1-(3-methoxyphenyl)ethylamine ((1R,2S):(1R,2R)=77:23) in a mixture of 4 ml of THF and 1 ml of water on an ice bath. The mixture was stirred on an ice bath for 3 hours and then at room temperature for 20 hours. A 2 N aqueous solution of sodium sulfite (5 ml) was added dropwise to the reaction mixture on an ice bath, and the resulting mixture was stirred at room temperature for 2 hours. Water (15 ml) was added to the reaction mixture, and the whole mixture was washed with 5 ml of ethyl acetate. To the aqueous layer was added 2 ml of a 1 N aqueous solution of hydrochloric acid (pH=2), and the resulting mixture was extracted with two 40-ml portions of ethyl acetate. The organic layer was concentrated under reduced pressure to give 0.078 g (83%, 62% ee) of the title compound as a colorless oil.

1. waitat room temperature for 20 hours
2. stirringthe resulting mixture was stirred at room temperature for 2 hours
3. washthe whole mixture was washed with 5 ml of ethyl acetate
4. additionTo the aqueous layer was added 2 ml of a 1 N aqueous solution of hydrochloric acid (pH=2)
5. extractionthe resulting mixture was extracted with two 40-ml portions of ethyl acetate
6. concentrationThe organic layer was concentrated under reduced pressure

ORD-Eintrag

ord-a4b4b5d7cc334bbfb66cb28f27c28bd9

Quelldatensatz

uspto-grants-2007_10

DOI

10.6084/m9.figshare.5104873.v1

Patentnummer

US07282605B2