Synthesis of Polysubstituted Alkenes by Heck Vinylation or Suzuki Cross-Coupling Reactions in the Presence of a Tetraphosphane−Palladium Catalyst
作者:Florian Berthiol、Henri Doucet、Maurice Santelli
DOI:10.1002/ejoc.200390161
日期:2003.3
4-tetrakis[(diphenylphosphanyl)methyl]cyclopentane as a catalyst, a range of vinyl bromides undergo Suzukicross-couplings with arylboronic acids in good yields. Furthermore, the catalyst can be used at low loadings, even for reactions of sterically hindered substrates. Mediated by this catalyst, stilbene and 1,1-diphenylethylene undergo Heckreactions with aryl halides to give triarylethylene derivatives
Visible-Light-Driven Reductive Carboarylation of Styrenes with CO<sub>2</sub> and Aryl Halides
作者:Hao Wang、Yuzhen Gao、Chunlin Zhou、Gang Li
DOI:10.1021/jacs.0c03144
日期:2020.5.6
The first example of visible-light-driven reductive carboarylation of styrenes with CO2 and aryl halides in a regioselective manner has been achieved. A broad range of aryl iodides and bromides were compatible with this reaction. Moreover, pyridyl halides, alkyl halides and even aryl chlorides were also viable with this method. These findings may stimulate the exploration of novel visible-light-driven
已经实现了以区域选择性方式将苯乙烯与 CO2 和芳基卤化物进行可见光驱动的还原碳芳基化的第一个例子。广泛的芳基碘化物和溴化物与该反应相容。此外,吡啶基卤化物、烷基卤化物甚至芳基氯化物也适用于该方法。这些发现可能会激发对新型可见光驱动的 Meerwein 芳基化加成反应的探索,该反应以用户友好的芳基卤作为自由基来源和 的光催化利用。
Palladium-catalyzed regioselective decarboxylative hydroarylation of alkynyl carboxylic acids with arylboronic acids
The synthesis of (deuterated) 1,1-disubstituted alkenes via Pd-catalyzed decarboxylative hydroarylation of alkynyl carboxylic acids with arylboronicacids has been developed. The reaction features excellent regioselectivity, a broad substrate scope and gram-scale synthetic ability and offers a general synthetic method to synthesize 1,1-dideuterio olefins. Preliminary mechanism investigations indicate