、 2-苯基哌嗪 、 三乙胺 、 碘甲烷 、 盐酸 以
丙酮 、 乙醚 、 甲醇 为溶剂,
反应 4.33h,
以to give 4.5 g (54%) of 1-methyl-3-phenylpiperazine dihydrochloride as a white solid的产率得到1-Methyl-3-phenylpiperazine dihydrochloride
The trans isomeric form of 1,3,4,6,7,11b-hexahydro-7-aryl-2H-pyrazino[2,1-a]isoquinolines are prepared using novel 3-phenyl-4-arylacyl-2-piperazinones and 3-phenyl-4-(2-hydroxy-2-arylethyl) piperazines as intermediates. The process involves reacting a nove piperazinone with a reducing agent such as aluminum hydrides, borane or lithium borohydrides, and then reacting the resulting piperazine with a strong acid, such as polyphosphoric or sulfuric acid.