selective synthesis of imines from biomass-derived chemicals over heterogeneous non-noble metal catalysts is of great importance for organic transformation. Herein, non-noble heterogeneous nitrogen-doped carbon supported Ni catalysts (abbreviated as Ni/CN–MgO-T, where T represents the pyrolysis temperature) have been facilely prepared from the simple pyrolysis of Ni precursors and biomass, and Ni/CN–MgO-600
在非均相的非贵金属催化剂上由生物质衍生的化学物质选择性合成亚胺对于有机转化非常重要。在此,已经通过简单的Ni前驱物和生物质热解和Ni / CN–的简单热解制备了非贵族非均质氮掺杂碳载Ni催化剂(缩写为Ni / CN–MgO- T,其中T表示热解温度)。 Ni纳米粒子尺寸最小的MgO-600表现出最高的催化活性。硝基芳烃和羰基化合物的还原偶联可以在温和的条件下(80°C和10 bar H 2),可提供结构多样的亚胺,具有高到极好的收率(84.2–98.1%)。由于反应条件温和,因此开发的方法显示出对其他官能团(如腈,卤素和乙烯基)的良好耐受性。
Phosphine ligand-free RuCl3-catalyzed reductive N-alkylation of aryl nitro compounds
作者:Da-Wei Tan、Hong-Xi Li、David James Young、Jian-Ping Lang
DOI:10.1016/j.tet.2016.05.036
日期:2016.7
efficiently catalyses the reductive N-alkylation of aryl nitrocompounds with alcohols using bio-based glycerol as the hydrogen source and without the need for any added solvents. The reaction can be easily manipulated to produce either imines or secondary amines in high yields. RuCl3-catalyzed reductive N-alkylation of nitroarenes with alcohols affords the corresponding imine products in good to excellent
Acceptorless Dehydrogenation of Alcohols Catalyzed by Cu<sup>I</sup><i>N</i>-Heterocycle Thiolate Complexes
作者:Da-Wei Tan、Hong-Xi Li、Meng-Juan Zhang、Jian-Lin Yao、Jian-Ping Lang
DOI:10.1002/cctc.201601459
日期:2017.3.20
CuI N‐heterocycle thiolate clusters efficiently catalyze the acceptorless dehydrogenation of alcohols at 70 °C. A variety of secondary/primary benzylic, allylic, and aliphatic alcohols are dehydrogenated to the corresponding ketones and aldehydes in high yields of isolated product upon release of H2. This simple catalytic system is involved in the synthesis of imines through the one‐pot reaction of
Cu I N杂环硫醇盐簇在70°C时有效催化醇的无受体脱氢。释放H 2时,可以以高收率的分离产物将各种仲/伯苄基,烯丙基和脂族醇脱氢成相应的酮和醛。这个简单的催化系统通过醇和胺的一锅法反应参与亚胺的合成。