Synthesis of<i>ortho</i>-Hydroxybenzophenones Catalyzed by Magnetically Retrievable Fe<sub>3</sub>O<sub>4</sub>Nanoparticles under Ligand-Free Conditions
作者:Thekkathu Ramani、Paspulati Umadevi、K. Leon Prasanth、Bojja Sreedhar
DOI:10.1002/ejoc.201300909
日期:2013.9
ortho-Benzoylation of phenols with aryl aldehydes to afford the substituted 2-hydroxybenzophenones can be catalyzed efficiently by Fe3O4 nanoparticles underligand-freeconditions. This method is useful for the preparation of xanthones in good yields. The catalyst can be magnetically removed and recycled easily over four cycles without a significant decrease in activity.
One-pot synthesis of ortho -acylphenols by palladium-catalyzed phenol C–H addition to nitriles
作者:Tao-Shan Jiang、Bei Gan、Xi Wang、Xiuli Zhang
DOI:10.1016/j.tetlet.2017.09.062
日期:2017.11
The regioselective one-pot synthesis of ortho-acylphenols via the palladium-catalyzedaddition of phenols to nitriles and subsequent hydrolysis is reported. The acylation reaction proceeded smoothly using the Pd(OAc)2/DMSO system and TFA as the additive. This method also provides a direct strategy for the synthesis of a salicylketoxime scaffold.