Development of a Palladium-Catalyzed Carbonylative Coupling Strategy to 1,4-Diketones
作者:Hongfei Yin、Dennis U. Nielsen、Mette K. Johansen、Anders T. Lindhardt、Troels Skrydstrup
DOI:10.1021/acscatal.6b00733
日期:2016.5.6
We report on a three-componentpalladium-catalyzed coupling strategy for accessing a wide range of 1,4-diketones, which represent important precursors to heterocycles. Our method relies on a carbonylative Heck reaction employing substituted allylic alcohols, aryl iodides, and carbon monoxide. The reaction conditions are mild and do not require high CO pressure, and a wide functional group tolerance
Benzoyl radicals are generated directly from (hetero)aromaticaldehydes upon tetrabutylammonium decatungstate ((n-Bu4N)4W10O32), TBADT) photocatalysis under mild conditions. In the presence of α,β-unsaturated esters, ketones and nitriles radical conjugate addition ensues and gives the corresponding β-functionalized aryl alkyl ketones in moderate to good yields (stereoselectively in the case of 3-m