Palladium-Catalyzed Direct β-C−H Arylation of Ketones with Arylboronic Acids in Water
作者:Xiaoyun Hu、Xiaobo Yang、Xi-Jie Dai、Chao-Jun Li
DOI:10.1002/adsc.201700277
日期:2017.7.17
A palladium‐catalyzed direct β‐C−H arylation of ketones was developed under mild conditions in water, featuring commercially available arylboronic acids as nucleophilic aryl sources and o‐iodoxybenzoic acid as the oxidant. The method provides a concise route to access β‐arylated ketones. Preliminary studies indicated that direct asymmetric β‐C−H arylation of ketones could be achieved by this strategy
Rh-catalyzed 1,4-addition of triallyl(aryl)silanes to α,β-unsaturated carbonyl compounds
作者:Toshiyuki Kamei、Mizuho Uryu、Toyoshi Shimada
DOI:10.1016/j.tetlet.2016.03.002
日期:2016.4
4-addition of triallyl(aryl)silane to α,β-unsaturatedcarbonylcompounds was developed. Triallyl(aryl)silanes were used as air- and moisture-stable silicon nucleophiles. Allylsilanes were converted to silanols in situ and underwent transmetalation. This method can accept a wide range of functionalized triallyl(aryl)silane and α,β-unsaturatedcarbonylcompounds.
Heterogeneous Gold Catalyst: Synthesis, Characterization, and Application in 1,4-Addition of Boronic Acids to Enones
作者:Alaina Moragues、Florentina Neaţu、Vasile I. Pârvulescu、Maria Dolores Marcos、Pedro Amorós、Véronique Michelet
DOI:10.1021/acscatal.5b01207
日期:2015.9.4
The new 1 wt % Au/TiO2-UVM-7 catalyst was prepared and fully characterized. This heterogeneous catalyst proved to be active, selective and recyclable for the unprecedented gold-catalyzed 1,4-addition of various functionalized arylboronic acids to 2-cyclohexen-1-one and other selected enones using toluene as a solvent. The gold-based catalyst was recycled two times and played an active role in this reaction, and the nature of the solvent determined a remarkable change in the products' selectivities.