Ligand-Free Pd-Catalyzed Double Carbonylation of Aryl Iodides with Amines to α-Ketoamides under Atmospheric Pressure of Carbon Monoxide and at Room Temperature
作者:Hongyan Du、Qing Ruan、Minghao Qi、Wei Han
DOI:10.1021/acs.joc.5b01249
日期:2015.8.7
A general Pd-catalyzed double carbonylation of aryl iodides with secondary or primary amines to produce α-ketoamides at atmospheric CO pressure has been developed. This transformation proceeds successfully even at room temperature and in the absence of any ligand and additive. A wide range of aryl iodides and amines can be coupled to the desired α-ketoamides in high yields with excellent chemoselectivities
Visible-light-mediated direct access to α-ketoamides by dealkylative amidation of tertiary amines with benzoylformic acids
作者:Zhiguo Zhang、Fangnan Liu、Jingwen Chen、Kai Zhou、Zongbi Bao、Baogen Su、Qiwei Yang、Qilong Ren、Yiwen Yang
DOI:10.1016/j.tetlet.2019.151191
日期:2019.10
visible-light induced directamidation of benzoylformic acids with tertiary amines has been explored. Tertiary amines underwent N-dealkylative amidation with α-ketoacid in the presence of [IrdFCF3ppy}2(bpy)]PF6 and Cs2CO3, affording the corresponding α-ketoamides in good yields under mild conditions. This transformation exhibits a wide substrate scope and provides a facile synthetic approach to α-ketoamides
已经研究了可见光诱导的苯甲酰基甲酸与叔胺的直接酰胺化。叔胺在[Ir dFCF 3 ppy} 2(bpy)] PF 6和Cs 2 CO 3的存在下用α-酮酸进行N-脱烷基酰胺化反应,在温和条件下以良好的收率得到相应的α-酮酰胺。这种转化表现出广泛的底物范围,并为α-酮酰胺提供了一种简便的合成方法。
Aryl-palladium-NHC complex: efficient phosphine-free catalyst precursors for the carbonylation of aryl iodides with amines or alkynes
作者:Chunyan Zhang、Jianhua Liu、Chungu Xia
DOI:10.1039/c4ob01878h
日期:——
aryl-palladium-NHC compounds was prepared according to the reported methods and their catalytic activity in the carbonylation of aryl iodides to synthesize α-keto amides and alkynones was examined. These practical aryl-palladium-NHC complexes have shown highly efficient catalyzed carbonylation and Sonogashira carbonylation reactions, with high turnover number in synthesis of α-keto amides (TON = 4300) and in synthesis
Cu(<scp>i</scp>)-Functionalized SBA-16: an efficient catalyst for the synthesis of α-ketoamides under moderate conditions
作者:Xueyao Zhang、Honglei Yang、Yong Huo、Jing Li、Jianxin Ma、Jiantai Ma
DOI:10.1039/c5dt04969e
日期:——
An efficient catalyst based on the cage-like mesoporous material SBA-16 as the support and Cu(I) as active sites has been successfully prepared. The catalyst demonstrated high catalytic activity (up to 88%) in the direct oxidative synthesis of α-ketoamides between acetophenone and piperidine, employing O2 from open air as the oxidant without other additives. A heterogeneous catalyst was applied in this reaction for the first time, and the catalyst could be easily separated from the reaction system by filtration and reused several times without a significant loss of activity.
novel tandem metal-free oxidative aryl migration/C–Cbond-cleavage reaction, mediated by hypervalent iodine reagent, has been discovered. The presented transformation provided straightforward access to important α-ketoamide and α-ketoester derivatives from readily available acrylic derivatives via a concerted process of 1,2-aryl shift concomitant with C–C bond cleavage.