反应详情

温度

90 °C

To a solution of 3.59 mmol 4-(5-trifluoromethyl-thiazol-2-yl)-piperazine-1-carboxylic acid tert-butyl ester in 20 ml dioxane was added dropwise 53.8 mmol hydrogen chloride solution (4 M in dioxane) and the mixture was stirred at 90° C. for 4 h. The reaction mixture was then cooled to 0° C. and diluted with ether. The resulting crystals were collected by filtration and washed with ether to afford the title compound as an off-white crystalline solid (yield 99%). MS (m/e): 238.1 (M+H+, 100%).

1. temperatureThe reaction mixture was then cooled to 0° C.
2. filtrationThe resulting crystals were collected by filtration
3. washwashed with ether