Synthesis of Halogenated Anilines by Treatment of N, N-Dialkylaniline N-Oxides with Thionyl Halides.

Synthesis of Halogenated Anilines by Treatment of N, N-Dialkylaniline N-Oxides with Thionyl Halides.
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DOI:
10.1021/acs.joc.8b01590
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发表时间:
2018-09-21
期刊:
The Journal of organic chemistry
影响因子:
--
通讯作者:
Chain WJ
Chain WJ
中科院分区:
其他
文献类型:
--
作者:
Reed H;Paul TR;Chain WJ

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N,N-二烷基苯胺N-氧化物的特殊反应性允许实际和方便地获得富电子芳基卤化物。一对互补的反应方案允许N,N-二烷基苯胺的选择性对位溴化或邻位氯化,分离产率高达69%。通过在低温下用亚硫酰氯或亚硫酰氯处理,N,N-二烷基苯胺暂时氧化水平增加为相应的N,N-二烷基苯胺N-氧化物,并切除所得的弱N-O键,可以产生多种卤代苯胺。
The special reactivity of N,N-dialkylaniline N-oxides allows practical and convenient access to electron-rich aryl halides. A complementary pair of reaction protocols allow for the selective para-bromination or ortho-chlorination of N,N-dialkylanilines in up to 69% isolated yield. The generation of a diverse array of halogenated anilines is made possible by a temporary oxidation level increase of N,N-dialkylanilines to the corresponding N,N-dialkylaniline N-oxides and the excision of the resultant weak N–O bond via treatment with thionyl bromide or thionyl chloride at low temperature.
DOI: 10.1016/s0040-4039(00)87031-8
发表时间: 1982-01-01
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