作者:Yoshiaki Nakao、Yuuya Yamada、Natsuko Kashihara、Tamejiro Hiyama
DOI:10.1021/ja106514b
日期:2010.10.6
Direct C-4-selective addition of pyridine across alkenes and alkynes is achieved for the first time by nickel/Lewis acid cooperative catalysis with an N-heterocyclic carbene ligand. A variety of substituents on both alkenes and pyridine are tolerated to give linear 4-alkylpyridines in modest to good yields. The addition across styrene, on the other hand, gives branched 4-alkylpyridines. A single example
通过镍/路易斯酸与 N-杂环卡宾配体的协同催化,首次实现了吡啶在烯烃和炔烃之间的直接 C-4 选择性加成。烯烃和吡啶上的各种取代基都可以耐受,以中等至良好的产率得到线性 4-烷基吡啶。另一方面,通过苯乙烯加成得到支化的 4-烷基吡啶。还描述了 C-4 选择性烯基化的一个例子。