4-Toluenesulfonyl chloride → 2-Tert-butyl-6-chlorocyclohexanone

関与物質

反応条件

反応手順

N-butyl lithium is added dropwise to a solution, cooled to 0° C., of diisopropylamine (5.5 mmol) in dry tetrahydrofuran. After the addition is complete the mixture is cooled to −78° C., and a solution of 2-tert-butylcyclohexanone (5 mmol) in dry tetrahydrofuran (50 ml) is introduced, followed by the addition of p-toluenesulphonyl chloride (5 mmol), also dissolved in dry tetrahydrofuran (50 ml). The reaction mixture is heated to room temperature and after stirring for 30 mins over silica gel filtered with ether as eluant. After concentration by evaporation in a vacuum 2-tert-butyl-6-chlorcyclohexanone (760 mg) is obtained in a yield of 81% (Tet. Lett. 1999, 40(12), 2231-2234).

情報源と証拠