β-Amino alcohols from anilines and ethylene glycol through heterogeneous Borrowing Hydrogen reaction
作者:Pedro J. Llabres-Campaner、Rafael Ballesteros-Garrido、Rafael Ballesteros、Belén Abarca
DOI:10.1016/j.tet.2017.08.006
日期:2017.9
Borrowing Hydrogen (BH), also called Hydrogen Autotransfer (HA), reaction with neat ethylene glycol represents a key step in the preparation of β-amino alcohols. However, due to the stability of ethylene glycol, mono-activation has rarely been achieved. Herein, a combination of Pd/C and ZnO is reported as heterogeneous catalyst for this BH/HA reaction. This system results in an extremely air and moisture
与纯乙二醇的借入氢(BH)也称为氢自动转移(HA),是制备β-氨基醇的关键步骤。然而,由于乙二醇的稳定性,很少实现单活化。在此,据报道Pd / C和ZnO的组合作为该BH / HA反应的非均相催化剂。该系统产生了极好的空气和湿气稳定性,并且经济的催化剂能够将水中的乙二醇单官能化,而无需进一步活化二醇。在这项工作中,已经探索了不同的二醇和芳族胺,为氨基醇的开发提供了一种新方法。这项研究揭示了两种固体物质的组合如何在异相中提供有趣的催化性能。ZnO激活乙二醇,而Pd / C则负责BH / HA循环。重新芳香化之前的原位BH / HA循环,代表串联异质过程。