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反应原理是：此物质中硝基及三氟甲基均为吸电子基团，故其邻位的两个氯比较活泼，且硝基的吸电子性比三氟甲基强，如果我们调整两种原料合适的比例关系，那么只会取代硝基邻位的氯。我们将所得到的衍生化试剂与哌嗪进行反应，从质谱信息上我们可以看到它们成功的发生了反应，但是最佳的反应条件还有待进一步的摸索。 [ Last edited by qingshaojun0823 on 2009-9-26 at 15:22 ] |
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| The reaction mechanism is as followings: due to the electron-withdrawing feature of nitro- and trifluoromethyl groups the chloro-groups on both ortho- positions are relatively reactive. In comparison to trifluoromethyl group nitro is a stronger electron-acceptor. Therefore, by tuning the stoichiometric ratio in the reaction one can certainly obtain product with substitution of purely the ortho- chloro-groups. The reaction of the as-prepared derivatives with Piperazine was successfully evidenced using mass spectroscopy; however, further optimization in the reaction condition is required. |
2楼2009-07-23 07:09:13
