Levulinic acid (LA) is transformed into pyrrolidinones via iridium-catalysed reductive amination using formic acid as the hydrogen source under aqueous conditions. The catalytic system is the most active and performs under the mildest conditions ever reported for the reductive amination of LA.
Ambient Reductive Amination of Levulinic Acid to Pyrrolidones over Pt Nanocatalysts on Porous TiO<sub>2</sub> Nanosheets
作者:Chao Xie、Jinliang Song、Haoran Wu、Yue Hu、Huizhen Liu、Zhanrong Zhang、Pei Zhang、Bingfeng Chen、Buxing Han
DOI:10.1021/jacs.8b13024
日期:2019.3.6
Construction of N-substituted pyrrolidones from biomass-derived levulinicacid (LA) via reductive amination is a highly attractive route for biomass valorization. However, realizing this transformation using H2 as the hydrogen source under mild conditions is still very challenging. Herein, we designed porous TiO2 nanosheets-supported Pt nanoparticles (Pt/P-TiO2) as the heterogeneous catalyst. The prepared Pt/P-TiO2
通过还原胺化从生物质衍生的乙酰丙酸 (LA) 构建 N 取代的吡咯烷酮是一种极具吸引力的生物质价值化途径。然而,在温和条件下使用 H2 作为氢源实现这种转化仍然非常具有挑战性。在此,我们设计了多孔 TiO2 纳米片负载的 Pt 纳米粒子(Pt/P-TiO2)作为多相催化剂。制备的 Pt/P-TiO2 在环境温度和 H2 压力下对 LA 的还原胺化非常有效,以生产各种 N-取代的吡咯烷酮(34 个实例)。同时,Pt/P-TiO2对乙酰丙酸酯、4-乙酰丁酸、2-乙酰苯甲酸和2-羧基苯甲醛的还原胺化显示出良好的适用性。
Direct Synthesis of Lactams from Keto Acids, Nitriles, and H<sub>2</sub>
by Heterogeneous Pt Catalysts
作者:S. M. A. H. Siddiki、Abeda S. Touchy、Ashvini Bhosale、Takashi Toyao、Yuji Mahara、Junya Ohyama、Atsushi Satsuma、Ken-ichi Shimizu
DOI:10.1002/cctc.201701355
日期:2018.2.21
We report herein the first general catalytic system for the direct synthesis of N‐substituted γ‐ and δ‐lactams by reductive amination/cyclization of keto acids (including levulinic acid) with nitriles and H2 under mild conditions (7 bar H2, 110 °C, solvent free). The most effective catalyst, Pt and MoOx co‐loaded TiO2 (Pt‐MoOx/TiO2), shows a wide substrate scope, high turnover number (TON), and good
我们在此报告的第一一般催化系统用于直接合成的N-取代的γ-和δ-内酰胺通过酮酸(包括乙酰丙酸)与腈和H还原胺化/环化2在温和条件下(7巴ħ 2,110 °C,无溶剂)。最有效的催化剂是Pt和MoO x共负载的TiO 2(Pt-MoO x / TiO 2),具有广泛的底物范围,高周转率(TON)和良好的可重复使用性。