An efficient method for aromatic Friedel–Crafts alkylation, acylation, benzoylation, and sulfonylation reactions
作者:Ravi P Singh、Rajesh M Kamble、Kusum L Chandra、P Saravanan、Vinod K Singh
DOI:10.1016/s0040-4020(00)01005-x
日期:2001.1
Aromatic electrophilic substitution reactions such as alkylation, acylation, benzoylation, and sulfonylation were studied in the presence of a catalytic amount of Cu(OTf)2 and Sn(OTf)2. Cu(OTf)2 was very efficient for alkylation, acylation, and benzoylation reactions. However, in case of sulfonylation reactions, Sn(OTf)2 gave better results.
CuI catalyzed sulfonylation of organozinc reagents with sulfonyl halides
作者:Ying Fu、Wenbo Zhu、Xingling Zhao、Helmut Hügel、Zhouqiang Wu、Yuhu Su、Zhengyin Du、Danfeng Huang、Yulai Hu
DOI:10.1039/c4ob00638k
日期:——
In this study, a facile CuI catalyzed synthesis of sulfones involving a nucleophilic addition of functionalized organozinc reagents to organic sulfonylchlorides is realized. This reaction proceeds efficiently at room temperature, giving rise to various functional group substitutedsulfones, generally in moderate to high yields. The method provides a novel, simple, and promising strategy for functionalized
An efficient Cu-catalyzed microwave-assisted synthesis of diaryl sulfones
作者:Ganesh C. Nandi
DOI:10.1080/00397911.2016.1263337
日期:2017.2.16
ABSTRACT An efficient and microwave-assisted simple protocol for the synthesis of symmetrical/asymmetrical diaryl sulfones through the Cu(II)-catalyzed reaction of sodium salt of sulfinic acid with aryl boronic acid has been described. Various diaryl sulfones have been synthesized in very short reaction times with moderate to very good yields. Additionally, the method is also useful for the synthesis of aryl
Selective Synthesis of <i>ortho-</i>Substituted Diarylsulfones by Using NHC-Au Catalysts under Mild Conditions
作者:Haibo Zhu、Yajing Shen、Daheng Wen、Zhang-Gao Le、Tao Tu
DOI:10.1021/acs.orglett.8b03957
日期:2019.2.15
A single-step gold(I)-catalyzed chemoselective protocol to access ortho-substituted diarylsulfones has been established. Acenaphthoimidazolylidene gold complexes are effective catalysts for the arylsulfonylation of boronic acids by potassium metabisulfite (K2S2O5) and diaryliodonium salts to access (poly-)ortho-substituted diarylsulfones even in gram scale. Unlike the transition metal-catalyzed two-component
已经建立了一步金(I)催化的化学选择方案以访问邻位取代的二芳基砜。ena啶咪唑基亚金络合物是焦亚硫酸氢钾(K 2 S 2 O 5)和二芳基碘鎓盐对硼酸进行芳基磺酰化的有效催化剂,即使以克为单位,也可得到(多)邻位取代的二芳基砜。与过渡金属催化的双组分偶联系统不同,二芳基碘鎓盐中的位阻芳基优先转移到体积较小的芳基上,以形成合成困难的靶标,包括具有药学重要性的靶标。
Sulfonylation of aromatic compounds with sulfonic acids using silica gel-supported AlCl<sub>3</sub>as a heterogeneous Lewis acid catalyst
作者:Kaveh Parvanak Boroujeni
DOI:10.1080/17415991003777391
日期:2010.6
Silica gel-supported aluminum chloride (SiO2–AlCl3) has been shown to be a mild, efficient, and chemoselective heterogeneous Lewis acid catalyst for direct conversion of arenes to sulfones usingsulfonicacids as sulfonylating agents. The catalyst can be prepared easily with cheap starting materials and is stable (as a bench-top catalyst) and reusable.