Specific ortho orientation in the vicarious substitution of hydrogen in aromatic nitro compounds with carbanion of chloromethyl phenyl sulfone
作者:M. Makosza、T. Glinka、A. Kinowski
DOI:10.1016/s0040-4020(01)91141-x
日期:1984.1
Vicarious nucleophilic substitution of hydrogen atoms in nitroarenes with chloromethylphenyl sulfone proceeds selectively ortho to the nitro group when carried out in t-BuOK/THF base/solvent system. In the majority of 3-substituted nitrobenzene derivatives substitution occurs at the most hindered position 2. These conditions offer an efficient method of synthesis of 2,6 and 2,3-disubstituted nitrobenzene
当在t-BuOK / THF碱/溶剂系统中进行硝基苯芳烃中的氢原子的替代亲核取代时,氯甲基苯基砜选择性地在硝基附近进行。在大多数3-取代的硝基苯衍生物中,大多数取代发生在受阻最大的位置2。这些条件提供了合成2,6和2,3-二取代的硝基苯衍生物的有效方法。