摘要 描述了从烯烃直接合成β-酮砜。发现邻碘氧苯甲酸/碘(IBX / I 2)的组合介导烯烃与芳烃亚磺酸盐的反应,通过一锅法反应以良好的产率产生β-酮砜。 描述了从烯烃直接合成β-酮砜。发现邻碘氧苯甲酸/碘(IBX / I 2)的组合介导烯烃与芳烃亚磺酸盐的反应,通过一锅法反应以良好的产率产生β-酮砜。
Oxidative Sulfonylation of Hydrazones Enabled by Synergistic Copper/Silver Catalysis
作者:Jun Xu、Chao Shen、Xian Qin、Jie Wu、Pengfei Zhang、Xiaogang Liu
DOI:10.1021/acs.joc.0c02249
日期:2021.3.5
A copper/silver-cocatalyzed protocol for oxidative sulfonylation of hydrazones is demonstrated. A wide range of β-ketosulfones and N-acylsulfonamides are directly synthesized in moderate to good yields. Our work provides a viable method for scalable preparation of β-ketosulfone derivatives that have found wide applications in the pharmaceutical industry.
A Regioselective Catalyst- and Additive-Free Synthesis of β-Keto Sulfones from Aryl Acetylenes and Sodium Arenesulfinates
作者:Bojja Sreedhar、Vikas Rawat
DOI:10.1055/s-0031-1290318
日期:2012.2
through a simple reaction of aryl acetylenes and sodium arenesulfinates in nitroethane as a solvent at 50 ˚C. The procedure is catalyst- and additive-free and shows a wide range of functional-group tolerance. In this system the formation of new C-O and C-S bonds occurs in a one-pot procedure. β-keto sulfone - aryl acetylene - sodium arene sulfinates - vinyl nitronic ester - sulfone - sulfinates salt
Selective sulfonylation and oxosulfonylation of alkenes with sulfinates have been developed via anodic oxidation in an undivided cell. The novel electrosynthetic method provided β-keto sulfones and vinyl sulfones with good to excellent yields in the absence of any transition metal catalyst and oxidants. Mechanism studies show that two different pathways involved in these two transformations.
reaction of aryldiazonium tetrafluoroborates and sulfur dioxide with silyl enolether under catalyst‐ and additive‐free conditions has been realized. This reaction proceeds efficiently at roomtemperature and goes to completion in half an hour. During the reaction process, aryldiazonium tetrafluoroborate is treated with DABCO⋅(SO2)2 (DABCO=1,4‐diazabicyclo[2.2.2]octane) to provide a sulfonyl radical as
Iron-catalyzed direct difunctionalization of alkenes with dioxygen and sulfinic acids: a highly efficient and green approach to β-ketosulfones
作者:Wei Wei、Jiangwei Wen、Daoshan Yang、Min Wu、Jinmao You、Hua Wang
DOI:10.1039/c4ob01369g
日期:——
A novel and efficient iron-catalyzed direct difunctionalization of alkenes with sulfinic acids and dioxygen for the synthesis of β-ketosulfones has been developed.