开发了一种高效且廉价的方法,该方法使用微波辅助的Ni 2 B辐射来合成芳族胺,吡咯并苯并二氮杂pine以及吡咯并喹唑啉酮。该方案适用于串联式树脂裂解,叠氮基还原和化合物3和5的环化反应,这些化合物以一锅方式提供取代的吡咯并[2,1- c ] [1,4]苯并二氮杂卓4和6。与常规的热反应相比,微波辅助的辐射反应以非常短的反应时间提高了产率。 吡咯并[2,1- c ] [1,4]苯并二氮杂卓-吡咯并喹唑啉酮-叠氮还原环化-硼化镍-微波辐射
Simple and Practical Synthesis of Various New Nickel Boride-Based Nanocomposites and their Applications for the Green and Expeditious Reduction of Nitroarenes to Arylamines under Wet-Solvent-Free Mechanochemical Grinding
paper, we report a simple synthesis of four new nickel boride-based nanocomposites, namely Ni2B@ZrCl4, Ni2B@Cu2O, Ni2B@CuCl2 and Ni2B@FeCl3, from commercially available and cheap starting materials. All of the new Ni2B-based nanocomposites were well characterized by Fourier-transform infraredspectroscopy, X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. Further
在本文中,我们报告了从商业上简单合成的四种新型硼化镍基纳米复合材料,即Ni 2 B @ ZrCl 4,Ni 2 B @ Cu 2 O,Ni 2 B @ CuCl 2和Ni 2 B @ FeCl 3。提供廉价的起始材料。所有新的Ni 2 B基纳米复合材料均通过傅里叶变换红外光谱,X射线衍射,扫描电子显微镜和能量色散X射线光谱得到了很好的表征。此外,在用硼氢化钠(NaBH)将芳族硝基化合物湿式无溶剂还原为芳胺的过程中,成功评估了这些新型纳米复合材料的催化应用。4)在室温下通过机械化学研磨技术。所有引入的催化体系都可以在很短的反应时间内为各种底物提供出色的芳基胺收率。此外,还研究了新型纳米复合材料的可回收性和可重复使用性。
Rapid and green reduction of aromatic/aliphatic nitro compounds to amines with NaBH4 and additive Ni2B in H2O
作者:Behzad Zeynizadeh、Mehdi Zabihzadeh
DOI:10.1007/s13738-014-0585-5
日期:2015.7
AbstractNaBH4 with catalytic amounts of Ni2B as an additive reagent reduced aromatic and aliphaticnitrocompounds to the corresponding amines in high to excellent yields. Reduction reactions were carried out in H2O within 3–30 min at room temperature or 75–80 °C. The catalytic activity of Ni2B as an additive reagent was superior to using the in situ precipitated one. Graphical Abstract
In order to improve the desulfurization efficiency, an ionic liquid (IL) was used as the solvent for the desulfurization of diesel fuel with nickel boride. The nickel boride prepared in IL–H2O showed high specific surface area. The desulfurization efficiency of model organosulfur compounds in this work was higher than that in the previous studies. The desulfurization reactivity of model organosulfur compounds followed the order of BT (DBT) > 3-MBT > 4,6-DMDBT. Furthermore, the products of model organosulfur compounds after desulfurization were analyzed by GC/MS and their corresponding reaction routes were proposed. The effectiveness of nickel salts followed the order of NiCl2 (Ni(OAc)2) > NiSO4 > Ni(NO3)2. The desulfurization efficiency of model diesel fuels reached 90.6% under the conditions of B/S molar ratio = 9, Ni(OAc)2/S molar ratio = 3, oil/IL volume ratio = 3, water content in IL = 5%, and reaction time = 50 min. ILs maintained their original structures after regeneration. Finally, the desulfurization of real diesel fuel was carried out and a desulfurization efficiency of 88.6% was obtained in 50 min.
Polymer-protected Colloidal Nickel Boride in Ethanol and Its Catalytic Activity for Hydrogenation
作者:Yukimichi Nakao、Shoei Fujishige
DOI:10.1246/bcsj.53.1267
日期:1980.5
Colloidal nickel borides were prepared in ethanol from nickel(II) chloride and sodium borohydride using a polymer as a protective colloid. For atmospheric hydrogenation of olefins such as acrylamide at 30 °C, the colloid prepared by using poly(vinylpyrrolidone) exhibited catalyticactivity 15–60 times that of the usual nickel boride prepared without using a polymer. The high activity of colloidal nickel
胶体硼化镍是在乙醇中由氯化镍 (II) 和硼氢化钠制备的,使用聚合物作为保护胶体。对于丙烯酰胺等烯烃在 30°C 下的常压加氢,使用聚乙烯吡咯烷酮制备的胶体的催化活性是不使用聚合物制备的普通硼化镍的 15-60 倍。发现胶体硼化镍的高活性是由于聚合物,可溶性尼龙是最有效的。胶体在无氧氢气下是稳定的,暴露在空气中会立即分解。
Synthesis of cyclooxygenase metabolites of 8,9-epoxyeicosatrienoic acid (EET): 11- and 15-hydroxy 8,9-EETs
作者:Bogdan Barnych、Amy A. Rand、Tomas Cajka、Kin Sing Stephen Lee、Bruce D. Hammock
DOI:10.1039/c7ob00789b
日期:——
COX metabolites of 8,9-EET, previously observed as potent mitogenic lipid mediators, were synthesized for the first time by using two synthetic approaches. These synthetic materials allow for structural confirmation of COX metabolites of 8,9-EET and further study of their biological roles.