Room temperature copper-catalyzed oxidative amidation of terminal alkynes for the synthesis of α-ketoamides using O-benzoyl hydroxylamines as aminating reagent and oxidant
A novel and convenient copper-catalyzed oxidative amidation for the synthesis of α-ketoamides has been successfully developed, which uses easily available O-benzoyl hydroxylamines as aminating reagent and oxidant. The reaction proceeds smoothly at room temperature and is compatible with a range of substrates to give the desired products in moderate to good yields.
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.
A novel and metal-free approach towards α-ketoamides using a TBHP/I<sub>2</sub>-promoted tandem reaction of amines with β-diketones via C–C bond cleavage
作者:Xiaobin Zhang、Min Wang、Yicheng Zhang、Lei Wang
DOI:10.1039/c2ra22116k
日期:——
A novel approach towards the synthesis of α-ketoamides using a TBHP/I2-promoted tandem reaction of amines with β-diketones via CâC bond cleavage has been developed. This one-pot reaction proceeded well under metal-free conditions and generated the corresponding products with good yields.
A novel and easy practical direct synthesis of alpha-ketoamides has been developed without metals in water. This procedure was catalyzed by nBu(4)NI using TBHP as oxidantfrom simple substrates, aryl methyl ketones and dialkylformamides.
Metal free synthesis of α-keto amides from 2-hydroxy acetophenones through domino alcohol oxidation–oxidative amidation reaction
作者:Surya Srinivas Kotha、Govindasamy Sekar
DOI:10.1016/j.tetlet.2015.09.053
日期:2015.11
An efficient method for the synthesis of α-ketoamides using 2-iodoxybenzoic acid (IBX) promoted dominoalcoholoxidation and oxidativeamidation reaction sequence between 2-oxoalcohols and amines under metal-free conditions is developed. In this protocol, IBX is used as an oxidizing agent to synthesize the α-ketoamides, which makes this methodology highly efficient, practical, and environmentally