Functionalization of saturated hydrocarbons by aprotic superacids .4. Ionic bromination of ethane and other alkanes and cycloalkanes with molecular bromine in the presence of systems based on polyhalomethanes and AlBr3 under mild conditions

被引：10

作者：

Akhrem, IS

Orlinkov, AV

Afanaseva, LV

Volpin, ME

机构：

[1] A. N. Nesmeyanov Inst. O., Russian Academy of Sciences, 117813 Moscow

来源：

RUSSIAN CHEMICAL BULLETIN | 1996年 / 45卷 / 05期

关键词：

alkanes; cycloalkanes; ionic bromination; polyhalomethanes; aluminum halides complexes; aprotic superacids;

D O I：

10.1007/BF01431609

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Aprotic organic superacids CBr4 . 2AlBr(3), CBr4 . AlBr3, CHBr3 . 2AlBr(3), CCl4 . 2AlBr(3), and C6F5CF3 . 2AlBr(3) efficiently catalyze the bromination of alkanes and cycloalkanes with Br-2. Ethane is selectively brominated at 55-65 degrees C to give mostly 1,2-dibromoethane (stoichiometric reaction). Propane, butane, cyclopentane, cyclohexane, and methylcyclopentane react with Br-2 at -40 to -20 degrees C with good selectivity affording monobromides in high yields (catalytic reactions).

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页码：1148 / 1153

页数：6

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