A highly site-selective acyloxylation of stable enamines with PhI(OAc)2 under metal-free conditions to afford (E)-vinyl acetate derivatives in good to excellent yields is described. Depending on the judicious choice of the solvent system, either the α- or β-site-selective product could be obtained with high selectivity. For the α-site-selective product, the rearranged amide compound is obtained as
Copper-Mediated Synthesis of Aryl α-Keto Amides from Epoxide Derivatives
作者:Heng Xu、Fenghua Liu、Yunjian Cui、Yi Dong
DOI:10.1055/s-0040-1707990
日期:2020.6
A novel CuII-mediated synthesis of aryl α-keto amides fromepoxide derivatives is reported. This transformation was conducted by using O2 as a green oxidant that meets the requirements of sustainable chemistry.
Synthesis of α-Ketoamides from Aryl Methyl Ketones and N,N-Dimethylformamide via Copper-Catalyzed Aerobic Oxidative Coupling
作者:Qiuling Song、Mingxin Zhou
DOI:10.1055/s-0033-1339109
日期:——
Abstract A copper-catalyzedaerobicoxidativecoupling of aryl methyl ketones with N,N-dimethylformamide was developed, which afforded α-ketoamides by a sequence of dioxygen activation, C–H bond functionalization, and amide formation with N,N-dimethylformamide as the nitrogen source. Molecular oxygen was found to play a crucial role in this transformation. A copper-catalyzedaerobicoxidativecoupling of aryl
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。
Coupling of Methyl Ketones and Primary or Secondary Amines Leading to α-Ketoamides
作者:Wei Wei、Ying Shao、Huayou Hu、Feng Zhang、Chao Zhang、Yuan Xu、Xiaobing Wan
DOI:10.1021/jo301117b
日期:2012.9.7
A metal-free oxidative coupling of methyl ketones and primary or secondary amines to α-ketoamides has been developed. Four intermediates, α-iodoketone, α-aminoketone, iminium intermediate, and α-hydroxy amine have been identified through a series of control experiments. The atom-economic methodology can be scaled-up, tolerates a variety of functional groups, and is operationally simple.