of thiols with stable allylcarbonate and allylacetate reagents offers several advantages over established reactions for the formation of thioethers. We could demonstrate that Pd/BIPHEPHOS is a catalyst system which allows the transition metal-catalyzed S-allylation of thiols with excellent n-regioselectivity. Mechanistic studies showed that this reaction is reversible under the applied reaction conditions
Catalytic Activation of Diazo Compounds Using Electron-Rich, Defined Iron Complexes for Carbene-Transfer Reactions
作者:Michael S. Holzwarth、Isabel Alt、Bernd Plietker
DOI:10.1002/anie.201201409
日期:2012.5.29
transfer: The electron‐rich iron complex Bu4N[Fe(CO)3(NO)] efficientlycatalyzes different carbene‐transfer reactions. Various diazo compounds can be used. The high stability of the employed iron complexes is demonstrated by the generation of the diazo reagent in situ and a sequential iron‐catalyzed allylic sulfenylation/Doyle–Kirmse reaction.
碳转移:富电子的铁络合物Bu 4 N [Fe(CO)3(NO)]有效催化不同的卡宾转移反应。可以使用各种重氮化合物。重氮试剂的原位生成和连续的铁催化的烯丙基亚磺酰化/道尔-柯尔姆斯反应证明了所用铁配合物的高稳定性。
Silver-catalysed Doyle–Kirmse reaction of allyl and propargyl sulfides
作者:Paul W. Davies、Sébastien J.-C. Albrecht、Giulio Assanelli
DOI:10.1039/b822584b
日期:——
The silver-catalysed Doyle–Kirmse reaction of propargyl and allylsulfides with diazo compounds is disclosed. The carbon–carbon bond forming process proceeds with a range of substituents and functionality under mild conditions.
Highly Regioselective Thiocarbonylation of Conjugated Dienes via Palladium-Catalyzed Three-Component Coupling Reactions
作者:Wen-Jing Xiao、Giuseppe Vasapollo、Howard Alper
DOI:10.1021/jo000231o
日期:2000.6.1
Three-component coupling reaction of conjugated dienes, thiols, and carbon monoxide affords an atom-economical thiocarbonylation of the dienes to give beta,gamma-unsaturated thioesters as the sole products. A catalyst system based on [Pd(OAc)(2)] and Ph(3)P showed excellent catalytic activity. The thiocarbonylation was performed under an atmosphere of carbon monoxide (400 psi) at 110 degrees C in CH(2)Cl(2)
Palladium-catalyzed insertion reactions of trimethylsilyldiazomethane
作者:Kevin L Greenman、David S Carter、David L Van Vranken
DOI:10.1016/s0040-4020(01)00363-5
日期:2001.6
Palladium(II) salts catalyze the Kirmse reaction of allylsulfides with trimethylsilyldiazomethane (TMSD) to give homoallylsulfides. Similarly, TMSD can intercept ArPdX intermediates generated during Stille couplings to give benzhydryl derivatives. The yields of this process are limited by overinsertion and β-elimination. Insertion and elimination can be harnessed to generate styrenes from benzylic