Water → HCID 178495003, compound

Participants

Reaction Steps

A suspension of 4.5 g of methoxymethyl-triphenylphosphonium chloride in 40 ml of t-butyl methyl ether was treated within 3 minutes with 1.5 g of potassium t-butylate while gassing with argon at -10° C. and the solution was stirred for a further 1 hour at 0°-5° C. The suspension was then treated dropwise within 5 minutes at 0° C. with a solution of 2.0 g of [trans-4-(p-cyanophenyl)cyclohexyl]acetaldehyde in 20 ml of t-butyl methyl ether and the mixture was stirred for a further 2 hours at room temperature. The reaction mixture was subsequently poured into 100 ml of water and extracted three times with 100 ml of diethyl ether each time. The organic phased were washed twice with 100 ml of water each time, dried over magnesium sulphate and concentrated. The resulting, viscous oil was dissolved in 15 ml of ethyl acetate and the clear solution was treated with 250 ml of petroleum ether. After leaving to stand for 10 minutes at -20° C. the precipitated triphenylphosphine oxide was filtered off and the filtrate was concentrated to dryness. Low-pressure chromatography (0.5 bar) of the residue (3.3 g) on silica gel with ethyl acetate/petroleum ether (vol. 5:95) gave 2.04 g (91%) of p-[trans-4-(3-methoxy-2-propenyl)cyclohexyl]benzonitrile as a colourless oil; Rf-value (ethyl acetate/petroleum ether vol. 10:90) 0.33.

Provenance & Evidence