- Assembly of α-(Hetero)aryl Nitriles via Copper-Catalyzed Coupling Reactions with (Hetero)aryl Chlorides and Bromides
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α-(Hetero)aryl nitriles are important structural motifs for pharmaceutical design. The known methods for direct synthesis of these compounds via coupling with (hetero)aryl halides suffer from narrow reaction scope. Herein, we report that the combination of copper salts and oxalic diamides enables the coupling of a variety of (hetero)aryl halides (Cl, Br) and ethyl cyanoacetate under mild conditions, affording α-(hetero)arylacetonitriles via one-pot decarboxylation. Additionally, the CuBr/oxalic diamide catalyzed coupling of (hetero)aryl bromides with α-alkyl-substituted ethyl cyanoacetates proceeds smoothly at 60 °C, leading to the formation of α-alkyl (hetero)arylacetonitriles after decarboxylation. The method features a general substrate scope and is compatible with various functionalities and heteroaryls.
- Chen, Ying,Xu, Lanting,Jiang, Yongwen,Ma, Dawei
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supporting information
p. 7082 - 7086
(2021/02/26)
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- Two-step cyanomethylation protocol: Convenient access to functionalized aryl- and heteroarylacetonitriles
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A two-step protocol has been developed for the introduction of cyanomethylene groups to metalated aromatics through the intermediacy of substituted isoxazoles. A palladium-mediated cross-coupling reaction was used to introduce the isoxazole unit, followed by release of the cyanomethylene function under thermal or microwave-assisted conditions. The intermediate isoxazoles were shown to be amenable to further functionalization prior to deprotection of the sensitive cyanomethylene motif, allowing access to a wide range of aryl- and heteroaryl-substituted acetonitrile building blocks.
- Lindsay-Scott, Peter J.,Clarke, Aimee,Richardson, Jeffery
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supporting information
p. 476 - 479
(2015/03/05)
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- Design, synthesis, and biological evaluation of novel imidazo[1,2-a]pyridine derivatives as potent c-met inhibitors
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A series of imidazo[1,2-a]pyridine derivatives against c-Met was designed by means of bioisosteric replacement. In this study, a selective, potent c-Met inhibitor, 22e was identified, with IC50 values of 3.9 nM against c-Met kinase and 45.0 nM
- Li, Chunpu,Ai, Jing,Zhang, Dengyou,Peng, Xia,Chen, Xi,Gao, Zhiwei,Su, Yi,Zhu, Wei,Ji, Yinchun,Chen, Xiaoyan,Geng, Meiyu,Liu, Hong
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supporting information
p. 507 - 512
(2015/05/27)
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