1,2-Dibromopropane → 1-[2-(Trifluoromethyl)phenyl]cyclobutanecarbonitrile

Beteiligte Stoffe

Reaktionsschritte

A solution of 12.6 g of (2-Trifluoromethyl-phenyl)-acetonitrile and 7.6 ml of 1,2-dibromopropane in 36 ml ether were added slowly through a dropping funnel to a suspension of 3.62 g of sodium hydride in 85 ml DMSO at 0° C. After addition, the ice-water bath was allowed to warm up to room temperature slowly and the reaction mixture was stirred at room temperature overnight. The reaction was carefully quenched with isopropyl and H2O. The suspension became clear. The organic layer was separated, and the aqueous layer was extracted twice with ether. The combined organic extracts were combined, dried and concentrated by evaporation in a vacuum. The residue was purified by column chromatography on silica-gel (EtOAc-hexane 2%-4%) to yield 8.5 g of product as a white solid.

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