Various diarylsulfides, including heteroaryl- and nitrogen-containing sulfides, have been efficiently prepared by rhodium-catalyzed odorless deborylative arylthiolation of organoborons with S-aryl thiosulfonates. The ready availability of starting materials and further transformation of sulfides have rendered a diverse range of organosulfur compounds easily accessible.
Palladium-Catalyzed Arylthiolation of Alkynes Enabled by Surmounting Competitive Dimerization of Alkynes
作者:Daisuke Uno、Keisuke Nogi、Hideki Yorimitsu
DOI:10.1021/acs.orglett.9b03056
日期:2019.10.18
By overcoming the unwanted catalytic dimerization of terminal alkynes, palladium-catalyzed carbothiolation of alkynes with heteroaryl sulfides has been accomplished to provide the corresponding β-heteroaryl alkenyl sulfides with high regio- and stereoselectivity. The key for the preferential arylthiolation is the use of arylsulfanyl segments, instead of alkylsulfanyl, for smooth C(heteroaryl)-SR1 bond
The C–S bond formation from arylhalides and thiols has been well established under various catalytic systems. In this work, user-friendly sulfinates have been exploited as an efficient sulfenylating reagent in the C–Scouplings through visible-light-induced photo/nickel dual catalysis under base- and external reductant-free conditions. A large number of aryl sulfide products were accessed with high
Assembly of (hetero)aryl thioethers <i>via</i> simple nucleophilic aromatic substitution and Cu-catalyzed coupling reactions with (hetero)aryl chlorides and bromides under mild conditions
作者:Weiqi Liu、Xinghao Jin、Dawei Ma
DOI:10.1039/d3gc02066e
日期:——
requirement of higher reaction temperatures for an SNAr reaction between thiols and less reactive electron-poor aryl halides described in earlier reports has triggered intensive studies on the development of metal- and photo-catalyzed methods to promote this transformation. We report here that an SNAr reaction of thiols with most electron-poor aryl halides takes place at RT–60 °C under the action of
早期报道中描述的硫醇和反应性较低的缺电子芳基卤化物之间的S N Ar 反应需要更高的反应温度,这引发了对开发金属和光催化方法以促进这种转变的深入研究。我们在此报告,在 K 2 CO 3和 DMAc的作用下,硫醇与大多数缺电子芳基卤化物在 RT–60 °C 下发生S N Ar 反应。在这种温和的条件下,碱和溶剂都起着至关重要的作用。对于对 S N不发生反应的(杂)芳基卤化物Ar反应中,鉴定出两种更强大的草酸二酰胺配体,使其Cu催化的偶联反应能够在低催化负载量下进行。这两种方法的结合为制备(杂)芳基硫醚提供了一种非常有吸引力的方法。