Magnetically recoverable catalytic Co–Co2B nanocomposites for the chemoselective reduction of aromatic nitro compounds
作者:Amit A. Vernekar、Sagar Patil、Chinmay Bhat、Santosh G. Tilve
DOI:10.1039/c3ra41090k
日期:——
Magnetically recoverable and recyclable Co–Co2B nanocomposites are described for the catalytic and chemoselectivereduction of nitroarenesusing two different hydrogen sources, sodium borohydride and hydrazine hydrate. Both the systems display an interesting chemoselectivereduction switch. The kinetics of reduction of nitroaromatics were studied for the first time and follow nitroreductase enzyme-like kinetics
描述了可磁回收和可循环利用的Co-Co 2 B纳米复合材料,用于使用两种不同的氢源(硼氢化钠和水合肼)催化还原和化学选择性还原硝基芳烃。这两个系统都显示了一个有趣的化学选择性还原开关。首次研究了硝基芳香族化合物的还原动力学,并遵循类似硝基还原酶的动力学,其中K cat(5.2×10 4 s -1)和K cat / K M(4.4×10 6 M -1 s -1)过高)值,达到催化完美状态。通过磁性回收纳米复合催化剂研究了催化剂体系的可回收性。
Transfer hydrogenation of nitroarenes with hydrazine at near-room temperature catalysed by a MoO<sub>2</sub> catalyst
作者:Chaofeng Zhang、Jianmin Lu、Mingrun Li、Yehong Wang、Zhe Zhang、Haijun Chen、Feng Wang
DOI:10.1039/c5gc02460a
日期:——
We present an experimental and computational study of the elementary steps of N2H4 hydrogen transfer on crystalline MoO2, and demonstrate its unique bifunctional metallic-basic properties in a catalytic hydrogenation reaction.
Lewis acid-promoted direct synthesis of N-unsubstituted hydrazones via the reaction of hydrazine with acetophenone and isatin derivatives
作者:A. S. El-Azab、H. A. Ghabbour、W. M. El-Husseiny、A. R. Maarouf、M. A. Mohamed、A. A.-M. Abdel-Aziz
DOI:10.1134/s1070363216120471
日期:2016.12
Hydrazones 2–22 were synthesized via the reaction of acetophenone with isatin derivatives and anhydrous hydrazine promoted by BF3 as a Lewis acid at 0°C. Structures of the synthesized hydrazones were determined on the basis of NMR and X-ray crystallographic analyses.