Silver-Catalyzed C(sp3)-H Sulfonylation for the Synthesis of Benzyl Sulfones Using Toluene Derivatives and α-Amino Acid Sulfonamides
作者:Kyalo Stephen Kanyiva、Kanako Uchida、Takanori Shibata
DOI:10.1246/bcsj.20200393
日期:2021.4.15
We describe a simple and practical protocol for the synthesis of benzyl sulfones using readily available toluene derivatives and α-aminoacid sulfonamides. The reaction proceeds to afford a broad range of benzyl sulfones in moderate to high yields under silver catalysis. The mechanism possibly involves a Minisci-type formation of α-aminoalkyl radical, homolytic cleavage of a N-S bond to generate a
Efficient synthesis of aliphatic sulfones by Mg mediated coupling reactions of sulfonyl chlorides and aliphatic halides
作者:Ying Fu、Qin-Shan Xu、Quan-Zhou Li、Zhengyin Du、Ke-Hu Wang、Danfeng Huang、Yulai Hu
DOI:10.1039/c7ob00251c
日期:——
Sulfonylchlorides were reduced to anhydrous sulfinate salts with magnesium under sonication. These sulfinates were alkylated to sulfones with alkyl chlorides in the presence of catalytic sodium iodide under sonication. A variety of aliphatic sulfones was efficiently prepared by this one-pot two-step procedure.
A general and practical sulfonylation of benzylic ammonium salts with sulfonyl hydrazides for the synthesis of sulfones
作者:Haibo Zhu、Yingying Zhang、Yishuai Liu、Liu Yang、Zongbo Xie、Guofang Jiang、Zhang-Gao Le
DOI:10.1016/j.tetlet.2020.151975
日期:2020.6
transition-metal-free cross-coupling of sulfonyl hydrazides with benzyl ammonium salts has been developed to synthesize benzyl sulfones using Cs2CO3 as base under mild conditions. The protocol employs stable and easy to handle coupling partners, and is endowed with good substrate compatibility, leading to functional benzyl sulfones in good yields.
已经开发出一种实用且有效的方法,该方法采用磺酰肼与苄基铵盐的无过渡金属交叉偶联,以Cs 2 CO 3为碱,在温和条件下合成苄基砜。该方案使用稳定且易于操作的偶联伙伴,并具有良好的底物相容性,从而可以高收率生产功能性苄砜。
Stereoselective Control by Face-to-Face Versus Edge-to-Face Aromatic Interactions: The Case of<i>C</i><sub>3</sub>-Ti<sup>IV</sup>Amino Trialkolate Sulfoxidation Catalysts
作者:Gabriella Santoni、Miriam Mba、Marcella Bonchio、Williamâ A. Nugent、Cristiano Zonta、Giulia Licini
DOI:10.1002/chem.200902072
日期:2010.1.11
The stereoselective oxidation of differently functionalised benzyl phenylsulfides has been examined by using enantiopure TiIV trialkanolamine complexes. These complexes efficiently catalyse the sulfoxidation with good stereoselectivities. The data highlight the contribution to the stereoselectivity of steric effects and non‐covalent π–π interactions between the aromatic rings of the TiIV complex and