A new method for synthesising trans1 cinnamylpiperazine from piperazine dihydrochloride the byproduct in cinnarizine preparation, total yield was 90.

• 提出了一种以桂利嗪副产哌嗪二盐酸盐为原料合成肉桂基哌嗪的方法；收率90.；6%25；纯度98