A Copper‐Catalyzed Sonogashira Coupling Reaction of Diverse Activated Alkyl Halides with Terminal Alkynes Under Ambient Conditions
作者:Yu‐Xi Cao、Xiao‐Yang Dong、Jun Yang、Sheng‐Peng Jiang、Shuangliu Zhou、Zhong‐Liang Li、Guo‐Qiang Chen、Xin‐Yuan Liu
DOI:10.1002/adsc.202000189
日期:2020.5.26
We describe a copper‐catalyzed Sonogashira coupling reaction of alkyl halides with terminalalkynesunder ambient conditions, efficiently providing a versatile tool for the construction of substituted alkynes. A new proline‐based N,N,P‐ligand is utilized to promote the transformation under a mild reaction condition. Diverse alkyl halides, such as primary and secondary (hetero)benzyl chlorides and bromides
We have developed an efficient Cu/N,N-bidentate imine ligand catalytic system for C(sp3)–C(sp) coupling to obtain internal alkynes, di/trisubstituted allenes and strained bridged cyclic lactams in moderate to excellent yields from readily available alkyl(benzyl) bromides in one-pot transformation. Density Functional Theory (DFT) assisted mechanistic study along with control experiments support the