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。
Direct imine formation by oxidative coupling of alcohols and amines using supported manganese oxides under an air atmosphere
作者:Bo Chen、Jun Li、Wen Dai、Lianyue Wang、Shuang Gao
DOI:10.1039/c4gc00336e
日期:——
Manganese oxides loaded on various supports have been prepared and studied for the direct imine formation by oxidative coupling of alcohols and amines. Among the catalysts, hydroxyapatite supported manganese oxides (MnOx/HAP) show the best activity and selectivity for this reaction in the absence of an additional base using air as the environmentally benign terminal oxidant. NH3-/CO2-TPD results show
已经制备了负载在各种载体上的锰氧化物,并研究了通过醇和胺的氧化偶联直接形成亚胺的方法。在这些催化剂中,羟基磷灰石负载的锰氧化物(MnO x / HAP)在没有使用空气作为环境友好的终端氧化剂的附加碱的情况下,对于该反应表现出最佳的活性和选择性。NH 3- / CO 2 -TPD结果表明,MnO x的两性性质/ HAP对于该反应获得令人满意的收率至关重要。各种芳族醇和胺均以良好或优异的收率平稳地转化为相应的亚胺。该催化剂可重复使用,并且在所有9次重复使用测试中均可提供98%的产品收率。与新鲜催化剂相比,经过九次反应后,再活化的MnO x / HAP的XRD和SEM没有明显变化。
C-N Bond Formation Catalyzed by Ruthenium Nanoparticles Supported on N-Doped Carbon via Acceptorless Dehydrogenation to Secondary Amines, Imines, Benzimidazoles and Quinoxalines
作者:Bin Guo、Hong-Xi Li、Shi-Qi Zhang、David James Young、Jian-Ping Lang
DOI:10.1002/cctc.201801525
日期:2018.12.21
Ruthenium nanoparticles (NPs) supported on N‐doped carbon (Ru/N−C) were prepared by the pyrolysis of cis‐Ru(phen)2Cl2 loaded onto carbon powder (VULCAN XC72R) at 800 °C. Ru/N−C NPs (0.2 mol% Ru) selectively catalyzed either acceptorless dehydrogenation coupling (ADC) or auto‐transfer‐hydrogen (ATH) reactions of amines with alcohols to imines and secondary amines. Such selectivity could be controlled