金属有机骨架 (MOF) 通道内定义明确的 Fe 3+孤立单金属原子和 Ag 2亚纳米金属簇的组合首次通过单晶 X 射线衍射进行了报道和表征。所得杂化材料,分子式为[Ag 0 2 (Ag 0 ) 1.34 Fe III 0.66 ]@Na I 2 {Ni II 4 [Cu II 2 (Me 3 mpba) 2 ] 3 }·63H 2 O ( Fe 3+银0 2 @MOF),能够在一锅中催化苯乙烯前所未有地直接转化为苯乙炔。特别是,Fe 3+ Ag 0 2 @MOF——可以很容易地以克规模获得——对苯乙烯与苯砜的无 TEMPO 氧化交叉偶联表现出优异的催化活性,以产生乙烯基砜,产率高达 >99 %,最终原位转化为相应的苯乙炔产物。这里展示的结果构成了一个典型的例子,说明在明确定义的固体催化剂中合成不同的金属物种,结合溶液中有机反应的真正金属催化剂的物种形成,允许设计一个新的具有挑战性的反应。
Electrosynthesis of (<i>E</i>)-Vinyl Sulfones Directly from Cinnamic Acids and Sodium Sulfinates via Decarboxylative Sulfono Functionalization
作者:Peng Qian、Meixiang Bi、Jihu Su、Zhenggen Zha、Zhiyong Wang
DOI:10.1021/acs.joc.6b00661
日期:2016.6.3
A variety of (E)-vinyl sulfones were constructed directly from cinnamic acids and sodium sulfinates with high regioselectivity at room temperature by virtue of an electrocatalytic oxidation. A radical intermediate was detected, and the corresponding mechanism was investigated.
Efficient Synthesis of Vinyl Sulfones by Manganese-Catalyzed Decarboxylative Coupling of Cinnamic Acids with Aromatic Sulfinic Acid Sodium Salts
作者:Wei Deng、Jiannan Xiang、Na Xue、Ruqing Guo、Xinman Tu、Weiping Luo
DOI:10.1055/s-0035-1562476
日期:——
An efficient synthesis of vinyl sulfones is described. Reactions of cinnamic acids with aromatic sulfinic acid sodium salts in the presence of a catalytic amount of manganese(II) acetate tetrahydrate (5 mol%) in dimethyl sulfoxide (DMSO) afforded the desired vinyl sulfones in good to excellent yields. Notably, the reaction does not need any base or iodide as additive. The use of DMSO as the solvent
描述了乙烯基砜的有效合成。在二甲基亚砜 (DMSO) 中催化量的四水合乙酸锰 (II) (5 mol%) 存在下,肉桂酸与芳族亚磺酸钠盐的反应以良好至极好的收率提供所需的乙烯基砜。值得注意的是,该反应不需要任何碱或碘化物作为添加剂。使用 DMSO 作为溶剂并在空气中进行反应是获得良好收率的关键。
Transition-metal-free synthesis of vinyl sulfones via tandem cross-decarboxylative/coupling reactions of sodium sulfinates and cinnamic acids
A transition-metal-free synthesis of vinyl sulfones, utilizing sodium sulfinates and cinnamic acids through tandem cross-decarboxylative/coupling reactions, has been developed.
The synthesis of vinyl sulfone derivatives via the reaction of arylpropiolic acids, K2S2O5, and aryl boronic acids is reported. The CuBr2/1,10-phenanthroline catalytic system in the presence of acetic acid provides the desired vinyl sulfones in moderate to good yield. Furthermore, the methodology features excellent functional group tolerance.
报道了通过芳基丙炔酸、K 2 S 2 O 5和芳基硼酸的反应合成乙烯基砜衍生物。在乙酸存在下的 CuBr 2 /1,10-菲咯啉催化体系以中等至良好的产率提供所需的乙烯基砜。此外,该方法具有出色的官能团耐受性。
<i>E</i>-Selective synthesis of vinyl sulfones <i>via</i> silver-catalyzed sulfonylation of styrenes
作者:Qingwen Gui、Kang Han、Zhuoliang Liu、Zhaohong Su、Xiaoli He、Hongmei Jiang、Bufan Tian、Yangyan Li
DOI:10.1039/c8ob01502c
日期:——
An efficient and highly E-selective protocol for the synthesis of vinyl sulfones is described. This simple protocol demonstrates the first synthesis of vinyl sulfonesvia a silver-catalyzed C–S bond coupling reaction. In addition, the success of the reaction was found to be critically dependent on the use of TEMPO as the additive.