Chemoselective reduction of α,β-unsaturated carbonyl compounds with UiO-66 materials
作者:Eva Plessers、Dirk E. De Vos、Maarten B.J. Roeffaers
DOI:10.1016/j.jcat.2016.05.013
日期:2016.8
Allylic alcohols, important intermediates in fine chemical industry, are typically obtained through chemoselective hydrogenation of α,β-unsaturated aldehydes. Here we show that UiO-66, a zirconium-based metal–organic framework can be used in the chemoselective hydrogenation of cinnamaldehyde, both under high hydrogen pressure as silver nanoparticle support, and as transfer hydrogenation catalyst in
烯丙醇是精细化工中的重要中间体,通常是通过α,β-不饱和醛的化学选择性加氢获得的。在这里,我们表明,UiO-66,一种基于锆的金属-有机骨架,可在高氢气压下用作银纳米颗粒载体,并用作Meerwein-Ponndorf-Verley(MPV)的转移加氢催化剂,用于肉桂醛的化学选择性加氢。 )减少。可循环使用的10 wt%Ag / UiO-66催化剂在6 h和50 bar H 2下在惰性溶剂N,N中对肉桂醇的选择性为66%之后达到了完全转化。-二甲基乙酰胺(DMA)。在120°C下放置24 h后,纯净的UiO-66作为MPV催化剂与异丙醇的结合达到了90%以上的选择性。底物的范围扩大到柠檬酸和香芹酮,这是两个很难选择性还原的α,β-不饱和羰基化合物。向UiO-66接头中引入NO 2-官能团以增加路易斯酸度显然对香芹酮的转化有利。