Synthesis of 1-Cyanoalkynes and Their Ruthenium(II)-Catalyzed Cycloaddition with Organic Azides to Afford 4-Cyano-1,2,3-triazoles
作者:Peiye Liu、Ronald J. Clark、Lei Zhu
DOI:10.1021/acs.joc.8b00424
日期:2018.5.4
terminal alkynes in the ruthenium(II)-catalyzed regiospecific azide–alkyne cycloaddition to afford 4-cyano-1,2,3-triazoles. A mechanistic proposal different from the one that terminal alkynes adopt under the same reaction conditions is proposed. This work provides a new and convenient two-step sequence to prepare 4-cyano-1,2,3-triazoles from terminal alkynes and organic azides.
描述了一种使用原位形成的氰在相对温和的条件下将末端炔烃转化为1-氰基炔烃的新方法。1-氰基炔烃在钌(II)催化的区域特异性叠氮化物-炔烃环加成反应中具有比末端炔烃更高的反应活性,从而提供4-氰基-1,2,3-三唑。提出了与末端炔在相同反应条件下采用的机理不同的机理。这项工作为从末端炔烃和有机叠氮化物制备4-氰基-1,2,3-三唑提供了一个新的方便的两步法。