The reaction of 2-aryl-1,1-dibromocyclopropanes with adduct NOCl·(SO3)n leading to 3-aryl-5-bromoisoxazoles as a result of nitrosation—heterocyclization of the cyclopropane ring was studied. The reaction is accompanied with electrophilic aromatic bromination. The mechanism of the transformation was discussed, the optimal reaction conditions to enhance the reaction selectivity were developed.
研究了 2-芳基-
1,1-二溴环丙烷与加合物 NOCl·(SO3)n 反应生成 3-芳基-5-
溴异恶唑的亚硝化-
环丙烷环杂环化反应。该反应伴随着亲电芳香
溴化。讨论了转化机理,确定了提高反应选择性的最佳反应条件。