Tailored Cobalt‐Catalysts for Reductive Alkylation of Anilines with Carboxylic Acids under Mild Conditions
作者:Weiping Liu、Basudev Sahoo、Anke Spannenberg、Kathrin Junge、Matthias Beller
DOI:10.1002/anie.201806132
日期:2018.9.3
first cobalt‐catalyzed hydrogenative N‐methylation and alkylation of amines with readily available carboxylic acid feedstocks as alkylating agents and H2 as ideal reductant is described. Combination of tailor‐made triphos ligands with cobalt(II) tetrafluoroborate significantly improved the efficiency, thus promoting the reaction under milder conditions. This novel protocol allows for a broad substrate scope
描述了胺的第一个钴催化的氢化N-甲基化和胺的烷基化,其中易得的羧酸原料作为烷基化剂,H 2作为理想的还原剂。量身定制的三价配体与四氟硼酸钴(II)的组合可显着提高效率,从而在较温和的条件下促进反应。即使在存在可还原的烯烃,酯和酰胺的情况下,该新颖的方案也允许具有良好的官能团耐受性的广泛底物范围。