Cleavage of the CN Bond in Carbodiimides via Release of High Ring Strain: A New Strategy for the Selective Synthesis of 2-Aminoaryl Alkynyl Imines
作者:Yi Zhou、Yue Chi、Fei Zhao、Wen-Xiong Zhang、Zhenfeng Xi
DOI:10.1002/chem.201304701
日期:2014.2.24
A novel pattern of the cleavage and reorganization of CN bond in the multicomponent reaction (MCR) of terminal alkynes or haloalkynes, carbodiimides, and benzynes is achieved for the first time to construct efficiently 2‐aminoaryl alkynyl imines. The selective formation and ring‐opening of the azetine intermediate with the high ring strain is essential for this reaction. Further transformation of
首次实现了在末端炔烃或卤代炔烃,碳二亚胺和苯炔烃的多组分反应(MCR)中C andN键裂解和重组的新模式,从而可以有效地构建2-氨基芳基炔基亚胺。具有高环应变的氮杂环丁烷中间体的选择性形成和开环对于该反应至关重要。探索了通过铜催化的环异构化进一步转化2-氨基芳基炔基亚胺以立体选择性地提供双环,三环和四环稠合吡咯啉的方法。