Isopropanol → 1-(3,4-Dichlorophenyl)-1-cyclobutane-carbonitrile

Beteiligte Stoffe

Reaktionsschritte

A solution of 3,4-dichlorobenzyl cyanide (25 g) and 1,3-dibromopropane (15 ml) in dry dimethyl sulphoxide (150 ml) was added dropwise under nitrogen to a stirred mixture of sodium hydride (7.5 g) dispersed in mineral oil (7.5 g) and dimethylsulphoxide (200 ml) at a temperature in the range 30° to 35° C. The mixture was stirred at room temperature for two hours and propan-2-ol (8 ml) and then water (110 ml) were added dropwise. The mixture was filtered through a diatomaceous earth sold under the Registered Trade Mark CELITE and the solid residue washed with ether. The ether layer was separated, washed with water, dried and evaporated. 1-(3,4-Dichlorophenyl)-1-cyclobutanecarbonitrile (b.p. 108°-120° C. at 0.15 Hg) was isolated by distillation. This method is a modification of that described by Butler and Pollatz (J. Org. Chem., Vol. 36, No. 9, 1971, p. 1308).

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