Nickel/Lewis Acid-Catalyzed Cyanoesterification and Cyanocarbamoylation of Alkynes
作者:Yasuhiro Hirata、Akira Yada、Eiji Morita、Yoshiaki Nakao、Tamejiro Hiyama、Masato Ohashi、Sensuke Ogoshi
DOI:10.1021/ja102346v
日期:2010.7.28
nickel/Lewis acid (LA) cooperative catalysis to give beta-cyano-substituted acrylates and acrylamides, respectively, in highly stereoselective and regioselective manners. The resulting adducts serve as versatile synthetic building blocks through chemoselective transformations of the ester, amide, and cyano groups as demonstrated by the synthesis of typical structures of beta-cyano ester, beta-amino
发现氰基甲酸酯和氰基甲酰胺通过镍/路易斯酸 (LA) 协同催化在炔烃上加成,分别以高度立体选择性和区域选择性的方式生成 β-氰基取代的丙烯酸酯和丙烯酰胺。由此产生的加合物通过酯、酰胺和氰基的化学选择性转化作为通用的合成构件,如β-氰基酯、β-氨基腈、γ-内酰胺、双取代马来酸酐和γ的典型结构的合成所证明的-氨基丁酸。另一方面,发现氰基甲酸酯硫酯和苯甲酰氰的相关反应在钯/LA 催化剂存在下通过脱羰在炔烃上加成。