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。
Vanadium-catalyzed Selective Oxidation of Sulfides to Sulfoxides
and Sulfones with H2O2
oxidation of sulfides to sulfoxides and sulfones with H2O2 in moderate to good yields is developed. The reaction proceeds in the presence of 2 mol % of VO(acac)2 at room temperature. All sulfoxides and sulfones were detected by gas chromatography, and the molecular structures of 2-methylbenzyl 4-methylphenyl sulfone, 4-methylbenzyl 4-methylphenyl sulfone, 2-bromobenzyl 4-methylphenyl sulfone, and 4-tert-butylbenzyl
摘要 开发了一种用 H 2 O 2以中等至良好产率将硫化物氧化成亚砜和砜的直接选择性方法。反应在室温下在2 mol% VO(acac) 2 的存在下进行。所有亚砜和砜均采用气相色谱法检测,2-甲基苄基4-甲基苯基砜、4-甲基苄基4-甲基苯基砜、2-溴苄基4-甲基苯基砜和4-叔丁基苄基苄基砜的分子结构由下式测定单晶 X 射线晶体学。
Zinc Enolate/Sulfinate Prepared from a Single-Run Reaction Using Zinc Dust with<i>O</i>-Tosylated 4-Hydroxy Coumarin and Pyrone