Selective synthesis of sulfoxides and sulfones <i>via</i> controllable oxidation of sulfides with <i>N</i>-fluorobenzenesulfonimide
作者:Xiaobo Xu、Leyu Yan、Shengqiang Wang、Panpan Wang、A-Xiu Yang、Xiaolong Li、Hao Lu、Zhong-Yan Cao
DOI:10.1039/d1ob01632f
日期:——
A practical and mild method for the switchable synthesis of sulfoxides or sulfonesvia selective oxidation of sulfides using cheap N-fluorobenzenesulfonimide (NFSI) as the oxidant has been developed. These highly chemoselective transformations were simply achieved by varying the NFSI loading with H2O as the green solvent and oxygen source without any additives. The good functional group tolerance makes
已经开发出一种实用且温和的方法,通过使用廉价的N-氟苯磺酰亚胺(NFSI) 作为氧化剂选择性氧化硫化物来切换合成亚砜或砜。这些高度化学选择性的转化是通过改变 NFSI 负载而实现的,H 2 O 作为绿色溶剂和氧源,没有任何添加剂。良好的官能团耐受性使该策略具有价值。
Efficient preparation of Zr(IV)-salen grafted mesoporous MCM-41 catalyst for chemoselective oxidation of sulfides to sulfoxides and Knoevenagel condensation reactions
Abstract Zr(IV)-salen-MCM-41 was prepared by reaction of NH2-MCM-41 with salicylaldehyde to afford Schiffbase ligands. Thereafter, ZrOCl2·8H2O was reacted with the Schiffbase ligands for complex formation. The structural properties of the synthesized materials were investigated by a number of analytical techniques including X-ray diffraction, N2 sorption-desorption, thermogravimetric analysis, Fourier
摘要 Zr(IV)-salen-MCM-41是通过NH2-MCM-41与水杨醛反应得到席夫碱配体而制备的。此后,ZrOCl2·8H2O 与席夫碱配体反应形成络合物。合成材料的结构特性通过多种分析技术进行研究,包括 X 射线衍射、N2 吸附-解吸、热重分析、傅里叶变换红外光谱、电感耦合等离子体原子发射光谱和能量色散 X 射线光谱。研究了用 Zr(IV)-Schiff 碱配合物功能化的介孔材料的催化研究,并将其扩展到硫化物选择性氧化成亚砜以及醛与丙二腈和氰基乙酸乙酯的 Knoevenagel 缩合反应。此外,
Highly efficient rhenium-catalyzed deoxygenation of sulfoxides without adding any reducing agent
作者:Sara C.A. Sousa、Joana R. Bernardo、Carlos C. Romão、Ana C. Fernandes
DOI:10.1016/j.tet.2012.07.071
日期:2012.9
This work reports a novel method for the deoxygenation of aromatic and aliphatic sulfoxides catalyzed by oxo-rhenium complexes without adding any reducing agent. The oxo-rhenium complex ReOCl3(PPh3)2 proved to be very efficient for the deoxygenation of several sulfoxides with tolerance of different functional groups.
An operationally simple and practical method for the reduction of sulfoxides into sulfides using tetrahydroxydiboron [B2(OH)4] as a deoxygenative agent in the absence of catalyst and additive is described. A wide range of diaryl-, dialkyl- and aryl/alkyl-sulfoxides was successfully converted into corresponding sulfides in 92–99% yields. The applicability and practicability were demonstrated by 36 examples
Reduction of sulfoxides catalyzed by the commercially available manganese complex MnBr(CO)5
作者:Daniel L. Lourenço、Ana C. Fernandes
DOI:10.1039/d4ob00204k
日期:——
A new methodology for the reduction of a widevariety of aliphatic and aromatic sulfoxides catalyzed by the air-stable, cheap and commercially available manganese catalyst MnBr(CO)5 with excellent yields is reported in this work. The catalytic system MnBr(CO)5/PhSiH3 is highly chemoselective, allowing the effective reduction of the SO bond in the presence of different functional groups.