Instituto de Tecnología Química UPV-CSIC, Universidad Politécnica de Valencia, Consejo Superior de Investigaciones Científicas, Avda. de los Naranjos, s/n, 46022 Valencia, Spain.
Dalton Trans. 2012 Apr 14;41(14):4249-54. doi: 10.1039/c2dt12480g. Epub 2012 Mar 2.
A bifunctional MOF catalyst containing coordinatively unsaturated Cr(3+) sites and palladium nanoparticles (Pd@MIL-101) has been used for the cyclization of citronellal to isopulegol and for the one-pot tandem isomerization/hydrogenation of citronellal to menthol. The MOF was found to be stable under the reaction conditions used, and the results obtained indicate that the performance of this bifunctional solid catalyst is comparable with other state-of-the-art materials for the tandem reaction: Full citronellal conversion was attained over Pd@MIL-101 in 18 h, with 86% selectivity to menthols and a diastereoselectivity of 81% to the desired (-)-menthol, while up to 30 h were necessary for attaining similar values over Ir/H-beta under analogous reaction conditions.
一种含有配位不饱和 Cr(3+)位点和钯纳米粒子(Pd@MIL-101)的双功能 MOF 催化剂已被用于柠檬醛环化生成异胡薄荷醇,以及柠檬醛一锅串联异构化/加氢生成薄荷醇。该 MOF 在使用的反应条件下被发现是稳定的,结果表明,这种双功能固体催化剂的性能可与用于串联反应的其他最先进材料相媲美:在 18 小时内,Pd@MIL-101 实现了柠檬醛的完全转化,对薄荷醇的选择性为 86%,对所需的(-)-薄荷醇的非对映选择性为 81%,而在类似的反应条件下,Ir/H-beta 需要长达 30 小时才能达到类似的值。