Toluene → ethyl cyano-[4-(1E-pentenyl)cyclohexylidene]acetate

Participants

Reaction Steps

A mixture of 33.3 g of 4-(1E-pentenyl)cyclohexanone (prepared in accordance with EP-A-168683), 42 ml of ethyl cyanoacetate, 300 ml of toluene and 2.9 g of piperidinium acetate is boiled for 1.5 hours on a water separator. After cooling the reaction mixture is washed with three 50 ml portions of water, dried over sodium sulphate and concentrated. Chromatographic purification of the residue on 750 g of silica gel with hexane/ethyl acetate (vol. 19:1) gives ethyl cyano-[4-(1E-pentenyl)cyclohexylidene]-acetate.

Provenance & Evidence