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【答案】应助回帖
dahuihui(金币+8, 翻译EPI+1): 2011-05-10 11:06:24
Further examination of the literature indicated that only a few reports of the Suzuki–Miyaura reaction of 2-pyridyl nucleophiles with aryl halides have appeared, and in these examples, only aryl iodides have been demonstrated as suitable coupling partners. The difficulty can be attrib-uted tos everal factors:1) Electron-deficient hetero aryl boron derivatives undergo transmetalation at a relatively slow rate, and 2) these reagents rapidly decompose by a protodeboro-nation pathway.
我们查阅了很多文献，发现有很少的文献报道2位吡啶基的卤代芳烃能发生Suzuki–Miyaura 偶联反应（铃木-宫浦反应），并且只有碘代芳烃能作为合适的偶合体。原因可能是：1）电子缺失的芳基硼衍生物发生慢速的反金属化作用；2）这些试剂经过硼化效用迅速分解。
有机药品翻不准，期待高手，虚心学习..... |
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