KIO<sub>3</sub>-Catalyzed Domino C(sp<sup>2</sup>)−H Bond Sulfenylation and C−N Bond Oxygenation of Enaminones toward the Synthesis of 3-Sulfenylated Chromones
作者:Shanshan Zhong、Yunyun Liu、Xiaoji Cao、Jie-Ping Wan
DOI:10.1002/cctc.201601273
日期:2017.2.6
With 2‐hydroxyphenyl‐functionalized enaminones and thiophenols as the starting materials, the facilesynthesis of 3‐sulfenylated chromones has been realized through a KIO3‐catalyzed domino reaction of C−H sulfenylation and subsequent C−N‐cleavage‐based C−O bondformation. The reaction was performed under transition‐metal‐free conditions in ethyl lactate, a bioavailable ecofriendly medium.
Ammonium iodide-mediated regioselective chalcogenation of chromones with diaryl disulfides and diselenides
作者:Tao Guo
DOI:10.1080/00397911.2017.1364766
日期:2017.11.17
ABSTRACT A metal-free method for the synthesis of 3-chalcogenyl-chromones/quinolones from chromones/quinolones and diorganyl dichalcogenides using ammonium iodide under air was developed. This approach allowed the preparation of a wide range of 3-selenyl- and 3-sulfenyl-chromones/quinolones in good to excellent yields. GRAPHICAL ABSTRACT
A novel ammonium iodide-induced sulfenylation method of flavones, indole and arylimidazo[1,2-a]pyridines using stable and odorless sodium benzenesulfinates as sulfur sources was developed, generating regioselective derivatives in good yields.
Making Flavone Thioethers Using Halides and Powdered Sulfur or Na<sub>2</sub>S<sub>2</sub>O<sub>3</sub>
作者:Qiujie Tang、Zhaogang Bian、Wei Wu、Jin Wang、Ping Xie、Charles U. Pittman、Aihua Zhou
DOI:10.1021/acs.joc.7b01320
日期:2017.10.6
C–S bonds is very important in organic synthesis. Here a new sulfenylation method to generate flavone thioether derivatives was developed by employing aromatic or alkyl halides, S powder and Na2S2O3 as reactants. Good yields of regioselective Calkyl–S and Caryl–S-substituted flavones were generated under relatively environmentally friendly and simple conditions. This method might be potentially applicable
构造CS键的方法在有机合成中非常重要。在这里,通过使用芳族或烷基卤化物,S粉和Na 2 S 2 O 3作为反应物,开发了一种新的磺酰化方法以生成黄酮硫醚衍生物。在相对环境友好和简单的条件下,可以产生高选择性的区域选择性C烷基-S和C芳基-S取代的黄酮。该方法可能潜在地适用于大规模生产,并且丰富了当前的亚磺酰化方法。