Palladium-Catalyzed Synthesis of Aryl Nitriles: Using α-Iminonitrile as Cyano Source for Aryl Halide Cyanations
作者:Yong-Ming Zhu、Yu-Long Shi、Qing Yuan、Zhen-Bang Chen、Fang-Ling Zhang、Kui Liu
DOI:10.1055/s-0036-1591501
日期:2018.2
An efficient and ligand-free palladium-catalyzed exchange reaction to synthesize aryl nitriles by using α-iminonitrile as a starting reagent has been developed. This methodology provides an optional method for the synthesis of aryl nitriles with moderate to good yields. At the same time, this approach is adaptable for many substrates.
Pd-Catalyzed Suzuki-Miyaura Cross-Coupling of Arylboronic Acids and α-Iminonitriles through C-CN Bond Activation
作者:Kui Liu、Shou-Wei Tao、Chun Qian、Yong-Ming Zhu
DOI:10.1002/ejoc.201800857
日期:2018.9.16
A valuable method for the Pd‐catalyzed Suzuki–Miyaura cross‐coupling of arylboronicacids has been developed, using α‐iminonitriles to replace acylnitriles. The reaction proceeds through selective activation of the C–CNbond, and avoids the “decarbonylation” side reaction of acylnitriles after activation.
one-pot synthesis of α-iminonitriles from readily available arylhalidesvia palladium-catalyzed double isocyanide insertion and elimination has been developed, without using various hypertoxic cyanides and excess oxidants. Furthermore, the utility of this reaction was demonstrated by the rapid total synthesis of quinoxaline and the reaction of functional groups exchanged with arylhalides.
Palladium catalyzed reactions of ternary systems involving bromobenzene, t-butyl isocyanide, and organotin compounds were found to occur giving the corresponding imines, although the catalytic efficiencies were rather low.