反应详情

温度

0 °C

At −20° C., a mixture of 3.12 g (10 mmol) of 2-(1-chloro-cyclopropyl)-1-(2-chlorophenyl)-3-(1,2,4-triazol-1-yl)-propan-2-ol and 45 ml of absolute tetrahydrofuran is admixed with 8.4 ml (21 mmol) of n-butyl-lithium in hexane and stirred at 0° C. for 30 minutes. The reaction mixture is subsequently cooled to −70° C., admixed with 0.32 g (10 mmol) of sulphur powder and stirred at −70° C. for 30 minutes. The mixture is warmed to −10° C., admixed with ice-water and adjusted to pH 5 by addition of dilute sulphuric acid, The mixture is extracted repeatedly with ethyl acetate and the combined organic phases are dried over sodium sulphate and concentrated under reduced pressure. In this manner, 3.2 g (93% of theory) of 2-(1-chloro-cyclopropyl)-1-(2-chlorophenyl)-3-(5-mercapto-1,2,4-triazol-1-yl)-propan-2-ol) are obtained in the form of a solid substance which, after recrystallization, melts at 138-139° C.

1. temperatureThe reaction mixture is subsequently cooled to −70° C.
2. stirringstirred at −70° C. for 30 minutes
3. temperatureThe mixture is warmed to −10° C.
4. extractionThe mixture is extracted repeatedly with ethyl acetate
5. dry with materialthe combined organic phases are dried over sodium sulphate
6. concentrationconcentrated under reduced pressure