A transition-metal-free synthesis of vinyl sulfones, utilizing sodium sulfinates and cinnamic acids through tandem cross-decarboxylative/coupling reactions, has been developed.
一种不含过渡金属的乙烯磺酰合成方法已经开发出来,它利用了亚硫酸钠和肉桂酸通过串联的脱羧/偶联反应。
Chemoselective Synthesis of Unsymmetrical Internal Alkynes or Vinyl Sulfones<i>via</i>Palladium-Catalyzed Cross-Coupling Reaction of Sodium Sulfinates with Alkynes
A highly efficient and mild palladium‐catalyzedcross‐coupling of sodium sulfinates and alkynes for the selective synthesis of unsymmetrical internal alkynes and vinyl sulfones has been developed. This methodology has advantages of easily accessible starting materials, functional group tolerance and a wide range of substrates, which provides rapid access to alkynes and vinyl sulfones.
A copper-catalyzedreaction protocol for the dehydrogenation of ethylbenzenes into styrene derivatives has been developed. This reaction procedure proceeded well under mild reaction conditions, providing a practical and efficient strategy for the rapid assembly of biologically and pharmaceutically significant molecules, such as vinyl sulfone. Simple alkyl arenes were functionalized via consecutive
已经开发出铜催化的用于将乙苯脱氢成苯乙烯衍生物的反应方案。该反应过程在温和的反应条件下进行得很好,为生物学和药学上重要的分子(如乙烯基砜)的快速组装提供了实用而有效的策略。在存在N-磺酰基苯并[ d ]咪唑的情况下,通过连续的β-消除作用将简单的烷基芳烃官能化,具有广泛的底物范围和良好的官能团耐受性。
Metal-free synthesis of (<i>E</i>)-vinyl sulfones <i>via</i> denitrative coupling reactions of <i>β</i>-nitrostyrenes with sodium sulfinates
developed through the coupling of β-nitrostyrenes with sodium sulfinates under microwave irradiation. This methodology provides a convenient and efficient approach to various (E)-vinyl sulfones from readily available starting materials with excellent regioselectivity. The present oxidative reaction involves an efficient denitrative radical cross-coupling of β-nitrostyrenes with sodium sulfinates via using
Silver-Catalyzed Denitrative Sulfonylation of β-Nitrostyrenes: A Convenient Approach to (<i>E</i>)-Vinyl Sulfones
作者:Twinkle Keshari、Ritu Kapoorr、Lal Dhar S. Yadav
DOI:10.1002/ejoc.201600237
日期:2016.5
(readily available by the Henry reaction) for a highly stereoselective, convenient, and catalytic synthesis of (E)-vinyl sulfones at room temperature was investigated. The protocol involves efficient silver-catalyzed denitrative radical cross-coupling of β-nitrostyrenes and sodium sulfinates by using potassium persulfate as an additive to complete the catalytic cycle.