One-Pot Synthesis of Dihalogenated Ring-Fused Benzimidazolequinones from 3,6-Dimethoxy-2-(cycloamino)anilines Using Hydrogen Peroxide and Hydrohalic Acid
作者:Martin Sweeney、Lee-Ann J. Keane、Michael Gurry、Patrick McArdle、Fawaz Aldabbagh
DOI:10.1021/acs.orglett.8b03135
日期:2018.11.2
3,6-Dimethoxy-2-(cycloamino)anilines undergo 4- or 6-electron oxidations to afford novel ring-fused halogenated benzimidazoles or benzimidazolequinones using H2O2/HCl or H2O2/HBr. Cl2 and Br2 are capable of the same oxidative transformation to the benzimidazolequinones. Labeling experiments indicate that water is necessary for oxidation of the para-dimethoxybenzenes to the corresponding quinones.
3,6-二甲氧基-2-(环氨基)苯胺经过4或6电子氧化,使用H 2 O 2 / HCl或H 2 O 2 / HBr生成新型的环稠合卤代苯并咪唑或苯并咪唑醌。Cl 2和Br 2能够相同的氧化转化为苯并咪唑醌。标记实验表明水是将对-二甲氧基苯氧化为相应醌所必需的。
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