Ir-catalysed formation of C−F bonds. From allylic alcohols to α-fluoroketones
作者:Nanna Ahlsten、Belén Martín-Matute
DOI:10.1039/c1cc12653a
日期:——
A novel iridium-catalysed tandem isomerisation/CâF bond formation from allylic alcohols and Selectfluor® to prepare α-fluorinated ketones as single constitutional isomers is reported.
isomerized into enolates (enols) by [Cp*IrCl2]2. The enolates react with Selectfluor present in the reaction media. This method produces α-fluoroketones as single constitutional isomers in high yields. iridium - fluorine - isomerization - alcohols - fluoro ketones
Micellar-System-Mediated Direct Fluorination of Ketones in Water
作者:Stojan Stavber、Gaj Stavber、Marko Zupan
DOI:10.1055/s-0028-1087924
日期:2009.3
A micellar system was developed and applied for direct regioselective fluorination of a variety of cyclic and acyclic ketones to α-fluoroketones in water as reaction medium with Selectfluor F-TEDA-BF 4 as fluorinating reagent. The inexpensive ionic amphiphile sodium dodecyl sulfate (SDS) was found to be an excellent promoter for fluorofunctionalization of hydrophobicketones without prior activation
Enantio and Diastereoselective Addition of Phenylacetylene to Racemic α-chloroketones
作者:Silvia Alesi、Enrico Emer、Montse Guiteras Capdevila、Diego Petruzziello、Andrea Gualandi、Pier Giorgio Cozzi
DOI:10.3390/molecules16065298
日期:——
In this report, we have presented the first diastereoselective addition of phenylacetylene to chiral racemic chloroketones. The addition is controlled by the reactivity of the chloroketones that allowed the stereoselective reaction to be performed at -20 °C. Chiral racemic chloroketones are used in the reaction. By carefully controlling the temperature and the reaction time we were able to isolate
在本报告中,我们首次展示了苯乙炔与手性外消旋氯酮的非对映选择性加成。添加量由氯酮的反应性控制,允许立体选择性反应在 -20 °C 下进行。反应中使用手性外消旋氯酮。通过仔细控制温度和反应时间,我们能够以中等产量和良好、简单和可预测的面部立体选择分离出相应的产品。我们的反应是在对映选择性炔基化反应中使用手性酮的罕见例子,并为手性四元立体中心的形成开辟了新的视角。