Intramolecular homolytic aromatic substitution of alkyl 2-benzimidazolyl sulfones as a means of entry into alkyl radicals for organic synthesis
作者:David Crich、Daniel Grant
DOI:10.1016/j.tetlet.2008.02.174
日期:2008.4
radical aromatic substitution of heteroaryl sulfones by tethered aryl radicals has been investigated as a source of alkyl radicals. The 1-(2-iodobenzyl)benzimidazole-2-sulfonyl system was found to be the most effective, while a tetrazole-based system did not undergo the desired radical aromatic substitution at all. Application of the benzimidazole-based system to the generation of alkyl radical and their
杂芳基砜被系链芳基的分子内芳基芳香取代已被研究作为烷基自由基的来源。发现 1-(2-iodobenzyl)benzimidazole-2-sulfonyl 系统是最有效的,而基于四唑的系统根本没有经历所需的自由基芳族取代。证明了基于苯并咪唑的系统在烷基自由基的生成中的应用以及它们随后在自由基环化中的应用。