Monatshefte für Chemie - Chemical Monthly ( IF 1.7 ) Pub Date : 2021-07-09 , DOI: 10.1007/s00706-021-02787-7 Sedigheh Azadi 1 , Ali Reza Sardarian 1 , Mohsen Esmaeilpour 2
|
Fe3O4@SiO2/Schiff base/Pd(II) is reported as a magnetically recoverable heterogeneous catalyst for the chemoselective reduction of aromatic nitro compounds to the corresponding amines through catalytic transfer hydrogenation (CTH). In this regard, a small amount of the nanocatalyst (0.52 mol% Pd) and hydrazine hydrate, showing safe characteristics and perfect ability as the hydrogen donor, were added to the nitro substrates. The experiments described the successful reduction of aromatic nitro compounds with good to excellent yields and short reaction times. The catalyst, due to its magnetic property, could be simply separated from the reaction mixture by a permanent magnet and reused in seven consecutive reactions without considerable loss in its activity. Moreover, the leaching of Pd was only 3.6% after the seventh run. Thus, the most striking feature of this method is to use a small amount of the magnetic nanocatalyst along with a cheap and safe hydrogen source to produce the important amine substances selectively, which makes the method economical, cheap, environmentally friendly, and simple.
Graphic abstract
中文翻译：
固定在 Fe3O4@SiO2 纳米颗粒上的 Pd(II) 的磁性可恢复席夫碱配合物：一种将芳香硝基化合物还原为苯胺衍生物的有效催化剂
Fe 3 O 4 @SiO 2据报道，/席夫碱/Pd(II) 是一种磁性可回收的多相催化剂，用于通过催化转移氢化 (CTH) 将芳香族硝基化合物化学选择性还原为相应的胺。在这方面，将少量纳米催化剂（0.52 mol% Pd）和水合肼添加到硝基底物中，显示出安全特性和完美的供氢能力。实验描述了芳香硝基化合物的成功还原，收率非常好，反应时间短。由于其磁性，催化剂可以简单地通过永磁体从反应混合物中分离出来，并在七个连续反应中重复使用，而不会显着降低其活性。此外，在第七次运行后，钯的浸出率仅为 3.6%。因此，
京公网安备 11010802027423号