8-chloro-1,4-benzodioxane-5-carboxylic acid 、
氯化亚砜 、 8-Chloro-1,4-benzodioxane-5-carbonyl chloride 、
N-甲基哌嗪 以14 g of 5-[(4-methyl-1-piperazinyl)-carbonyl]-8-chloro-1,4-benzodioxane were obtained (M.P.: 260° C. with decomposition; yield: 50.5%)的产率得到5-[(4-methyl-1-piperazinyl)-carbonyl]-8-chloro-1,4-benzodioxane