反应详情

4-(2-Oxo-2-p-tolyl-ethyl)-piperazine-1-carboxylic acid tert-butyl ester from Example E36.1 (661 mg, 2.08 mmol) was dissolved in 4M HCl solution in dioxan (25 ml) at 0° C. and the mixture was stirred for 45 min at room temperature. Solvents were concentrated in vacuo and azeotroped with diethyl ether to yield the title compound (536 mg, 88%).

1. concentrationSolvents were concentrated in vacuo
2. customazeotroped with diethyl ether