Catalytic Oxyalkylation of Alkenes with Alkanes and Molecular Oxygen via a Radical Process Using <i>N</i>-Hydroxyphthalimide
作者:Takafumi Hara、Takahiro Iwahama、Satoshi Sakaguchi、Yasutaka Ishii
DOI:10.1021/jo0157977
日期:2001.9.1
oxyalkylated products in 91% yield. Other alkenes such as fumarate and acrylonitrile also serve as good acceptors of alkyl radicals and O(2) to afford the corresponding adducts in high yields. The generality of the present reaction was examined between various alkanes and alkenes under dioxygen. The behavior of Co ions during the reaction course was discussed. The present reaction involves (i) an alkyl radical
通过使用N-羟基邻苯二甲酰亚胺(NHPI)结合Co物种作为催化剂,实现了将烷烃和分子氧自由基加成至缺电子烯烃的新催化方法。此反应称为烯烃与烷烃和O(2)的烷氧基化。例如,在分子氧下,在催化量的NHPI和Co(acac)(3)的存在下,70℃下1,3-二甲基金刚烷与丙烯酸甲酯的反应16小时,制得的烷氧基化产物的收率为91%。其他烯烃,例如富马酸酯和丙烯腈,也可以作为烷基和O(2)的良好受体,以高收率提供相应的加合物。在双氧下在各种烷烃和烯烃之间检查了本反应的一般性。讨论了Co离子在反应过程中的行为。