Silver-catalyzed amidation of benzoylformic acids with tertiary amines via selective carbon–nitrogen bond cleavage
作者:Xiaobin Zhang、Wenchao Yang、Lei Wang
DOI:10.1039/c3ob40619a
日期:——
A novel approach towards the synthesis of α-ketoamides using tertiary amines as nitrogen group sources via C–N bond cleavage has been developed. In the presence of Ag2CO3 and K2S2O8, α-keto acids reacted with tertiary amines to afford the corresponding α-ketoamides in good yields.
已经开发出一种通过叔胺作为氮基源通过C–N键断裂合成α-酮酰胺的新方法。在Ag 2 CO 3和K 2 S 2 O 8的存在下,α-酮酸与叔胺反应以良好的产率得到相应的α-酮酰胺。
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
Visible‐Light Mediated Photooxidative Synthesis of α‐Keto Amides
作者:Aparna Monga、Amar Prakash Pandey、Anuj Sharma
DOI:10.1002/adsc.201900279
日期:2019.8.5
Photocatalytic amidation of α‐keto aldehydes is herein investigated. This transformation was achieved using rose bengal as photocatalyst at room temperature under ambient air and under irradiation of a 20 W white LED bulb. The method is mild, efficient and environmentally benign. This photocatalytic method is compatible with different unsubstituted and substituted α‐keto aldehydes having electron‐withdrawing
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.