A palladium-catalyzed carbothiolation via the reaction of a σ-alkyl palladium intermediate with a TIPS thioether is described. It was found that the use of Cs2CO3, (IPr)Pd(allyl)Cl, and a TIPS thioether was key to obtaining alkyl aryl and dialkyl sulfides in high yield through the reaction of a σ-alkyl palladium intermediate. The developed reaction is applicable to a wide range of substrates and thiols
描述了通过σ-烷基钯中间体与TIPS硫醚反应的钯催化的羰基硫醇化。发现使用Cs 2 CO 3,(IPr)Pd(烯丙基)Cl和TIPS硫醚是通过σ-烷基钯中间体反应以高收率获得烷基芳基和二烷基硫化物的关键。所开发的反应适用于多种底物和硫醇。
Palladium-Catalyzed Thiocarbonylations with Triisopropylsilyl Thioethers
We have developed a palladium-catalyzed thiocarbonylation through the reaction of a σ-alkyl palladium intermediate with carbonmonoxide and a triisopropylsilyl (TIPS) thioether. The use of CsF, (IPr)Pd(allyl)Cl [IPr =1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene], CO, and a TIPS thioether in THF are key to obtaining alkyl and aryl thioesters in high yields. The yield of the palladium-catalyzed thiocarbonylation
A palladium-catalyzed cascade reaction for preparing 2,3-dihydrobenzo[b]thiophenes and the corresponding 1,1-dioxides bearing the C3 benzylic quaternary carbon is described. This cascade reaction involves the oxidative addition of aryl iodide to Pd(0) to form a σ-aryl palladium intermediate, insertion of the internal alkene into the σ-aryl palladium intermediate to form a σ-alkyl palladium intermediate