Formic acid as the H2-carrier and the transfer hydrogenation reagent for Ru-catalyzed hydroaminomethylation of olefins
作者:Da Yang、Cong-Kun Zhong、Lu-Yao Tian、Long-Li Zhang、Huan Liu
DOI:10.1016/j.jcat.2023.115132
日期:2023.12
Formic acid (FA) is a potential hydrogen storage substance due to its abundant resources, ease of storage, and high hydrogen content. In this paper, the hydroaminomethylation of olefins with FA as the hydrogen source was accomplished over DPEPhos-based Ru catalyst for the first time. Under optimal conditions, α-olefins or cycloolefins with steric hindrance obtained 62%∼96% yields of the target amines
甲酸(FA)因其资源丰富、易于储存、氢含量高而成为一种潜在的储氢物质。本文首次在DPEPhos基Ru催化剂上实现了以FA为氢源的烯烃加氢氨甲基化反应。在最佳条件下,具有位阻的α-烯烃或环烯烃得到了62%~96%的目标胺收率。通过原位高压1 H NMR 光谱分析、同位素标记实验以及分离的加氢甲酰化或还原胺化研究了 FA 的影响。表明FA分解提供H 2用于加氢甲酰化,并在亚胺/烯胺的转移氢化中用作还原剂。FA与底物胺的可逆酰胺化可以抑制醛转移氢化的副反应。此外,FA的参与将促进Ru-H物种的形成,从而促进氢氨甲基化。