Hydrochloric Acid → HCID 178444360, compound

Participants

Reaction Steps

A suspension of 404.4 mg of diphosphorus tetraiodide in 5 ml of methylene chloride was treated dropwise while gassing with argon at room temperature within 5 minutes with a solution of 205 mg of 4-ethoxy-1-[trans-4-(1,2-epoxypentyl)cyclohexyl]benzene and 0.703 ml of pyridine in 8 ml of methylene chloride. The suspension was heated to reflux while stirring, a further 404.4 mg of diphosphorus tetraiodide being added after 2 hours. After stirring under reflux for a total of 19 hours, the reaction was interrupted and the mixture was treated with 1N hydrochloric acid and extracted three times with diethyl ether. The organic extracts were washed successively with 1N hydrochloric acid, sodium thiosulphate solution and water, dried over magnesium sulphate, filtered and evaporated. Chromatographic separation of the residue (0.2 g) on silica gel with ethyl acetate/petroleum ether (vol. 3:97) as the eluent gave 120 mg of 4-ethoxy-1-[trans-4-(trans-1-pentenyl)cyclohexyl]benzene. After recrystallization from 10 ml of methanol, the product was obtained as white crystals of melting point (C--N) 32.2° C. and clearing point (N--I) 54.9° C.

Provenance & Evidence