作者:Balakrishna Aegurla、Nisha Jarwal、Rama Krishna Peddinti
DOI:10.1039/d0ob01200a
日期:——
An iodine-catalyzed denitrative imino-diaza-Nazarov cyclization (DIDAN) methodology has been developed for the synthesis of pyrazoles with high to excellent yields by using α-nitroacetophenone derivatives and in situ generated hydrazones. The key transformation of this oxidative 4π-electrocyclization proceeds through an enamine–iminium ion intermediate. This rapid one-pot DIDAN protocol results in
已经开发了一种碘催化的脱硝亚氨基-二氮杂-纳扎罗夫环化 (DIDAN) 方法,用于通过使用 α-硝基苯乙酮衍生物和原位生成的腙合成具有高至优异产率的吡唑。这种氧化性 4π-电环化的关键转变是通过烯胺-亚胺离子中间体进行的。这种快速的一锅 DIDAN 协议导致 C-C 和 C-N 键的选择性生成以及 C-N 键的裂解。