以高收率合成了十二种新颖的二氢咖啡酸酰胺,并通过1 H NMR进行了全面表征,131 H NMR和MS。通过DPPH分析评估了它们的自由基清除活性。此外,评估了它们在加速储存和油炸条件下保护多不饱和油的能力。所有这些新化合物都具有比α-生育酚和丁基化羟基甲苯(BHT)更高的自由基清除活性。N-癸基-N-(3,5-二甲氧基-4-羟基苄基)-3-(3,4-二羟基苯基)丙酰胺的自由基清除活性分别比α-生育酚和BHT高1.7和4倍。在储存期结束时,用α-生育酚和BHT强化的菜籽油三酰甘油(CTAG)中氢过氧化物的各自含量分别比含酰胺的CTAG高6.1和1.4倍。油炸试验表明,含有N-癸基-N-苄基-3-(3,4-二羟基苄基)丙酰胺的CTAG为1.3、1.4,通过总极性化合物的量评估,其稳定性分别比用二氢咖啡酸,α-生育酚和BHT强化的油高1.6倍。而且,这些化合物具有显着的热稳定性,使其适合油炸应用。
Highly economical and direct amination of sp<sup>3</sup> carbon using low-cost nickel pincer catalyst
作者:Andrew Brandt、Ambar B. RanguMagar、Peter Szwedo、Hunter A. Wayland、Charlette M. Parnell、Pradip Munshi、Anindya Ghosh
DOI:10.1039/d0ra09639c
日期:——
first time, we report the use of an amide-based nickel pincer catalyst (1) for direct alkylation of amines viaactivation of sp3 C-H bonds. The reaction was accomplished using a 0.2 mol% catalyst and no additional activatingagents other than the base. Upon optimization, it was determined that the ideal reaction conditions involved solvent dimethyl sulfoxide at 110 °C for 3 h. The catalyst demonstrated
NaOH-Catalyzed Imine Synthesis: Aerobic Oxidative Coupling of Alcohols and Amines
作者:Ramachandra Reddy Donthiri、Rajendra D. Patil、Subbarayappa Adimurthy
DOI:10.1002/ejoc.201200716
日期:2012.8
The synthesis of imines starting from alcohols andamines has major advantages, because of their potential ap-plications and wide substrate scope. Alcohols are desirablestarting materials because they are readily available, inex-pensive, and theoretically produce only hydrogen or wateras a byproduct.Many research groups have reported the direct synthesisof imines through the coupling of alcohols and
Herein we report a novel palladium-catalyzedoxidativecarbonylation reaction for the synthesis of phthalimides with high atom- and step-economy. In our strategy, the imine and H2O, which are generated in situ from the condensation of aldehyde and amine, serve as self-sufficient directing group and nucleophile, respectively. This method provides rapid access to phthalimides starting from readily available
The reduction of imines to amines via transfer hydrogenation was achieved promoted by phosphine‐free manganese(I) catalyst. Using isopropanol as reductant, in the presence of tBuOK (4 mol %) and manganese complex [Mn(CO)3Br(κ2N,N‐PyCH2NH2)] (2 mol %), a large variety of aldimines (30 examples) were typically reduced in 3 hours at 80 °C with good to excellent yield.
Heterogeneous copper-catalyzed coupling of amines: a possible way for the preparation of imines
作者:Ágnes Magyar、Zoltán Hell
DOI:10.1007/s00706-016-1784-9
日期:2016.9
AbstractCopper(II) on 4-Å molecular sieves is an efficient catalyst for the preparation of imines from benzylamines under simple reaction conditions. No oxidative atmosphere or oxidizing agents are required. Preparative experiments showed that no aldehyde intermediate can be detected even under ambient atmospheric conditions. Graphical abstract