Cu(OAc)<sub>2</sub>-Promoted Ortho C(sp<sup>2</sup>)–H Amidation of 8-Aminoquinoline Benzamide with Acyl Azide: Selective Formation of Aroyl or Acetyl Amide Based on Catalyst Loading
作者:Tubai Ghosh、Pintu Maity、Brindaban C. Ranu
DOI:10.1021/acs.joc.8b01654
日期:2018.10.5
An efficient method for the C(sp2) amidation of 8-aminoquinoline benzamide by acyl azide in the presence of copper acetate has been achieved via C–H activation. Interestingly, the loading of copper acetate has a strong influence on the outcome of the reaction. The use of 1 equiv of copper acetate produces the corresponding aroyl amide, whereas the use of 2 equiv led to acetyl amide. A series of substituted
Synthesis of <i>N</i>-methylated amines from acyl azides using methanol
作者:Kaushik Chakrabarti、Kuheli Dutta、Sabuj Kundu
DOI:10.1039/d0ob01303j
日期:——
derivatives into N-methylamines was developed using methanol as the C1 source via the one-pot Curtius rearrangement and borrowing hydrogen methodology. Following this protocol, various functionalised N-methylated amines were synthesized using the (NNN)Ru(II) complex from carboxylic acids via an acyl azide intermediate. Several kinetic studies and DFT calculations were carried out to support the mechanism
使用甲醇作为 C1 源,通过一锅 Curtius 重排和借氢方法,将酰基叠氮化物衍生物转化为N-甲胺。按照该协议,使用 (NNN)Ru( II ) 配合物从羧酸通过酰基叠氮化物中间体合成各种功能化的N-甲基化胺。进行了几项动力学研究和 DFT 计算以支持该机制,并确定 Ru( II ) 配合物和碱在这种转变中的作用。
Synthesis and Biological Activity of Some Novel <i>N</i>-Aryl-<i>N</i>′-[5-(pyrid-4-yl)-1,3,4-thiadiazol-2-yl]ureas
作者:Xin-Jian Song、Xiao-Hong Tan、Yan-Gang Wang
DOI:10.1080/10426500701415857
日期:2007.6.14
With the aim of searching for biologically active urea compounds, a series of new N-aryl-N′-[5-(pyrid-4-yl)-1,3,4-thiadiazol-2-yl]ureas have been designed and synthesized. Their structures were confirmed by IR, 1H NMR, and elemental analysis. The crystal structure of 3f was further determined by single crystal X-ray diffraction to obtain the structural information on this class of compounds. The preliminary
A metal-free PhI(OAc)2-mediated method for the synthesis of acyl azides through oxidative cleavage of 1,3-diketones is described. This method is shown to have a broad substrate scope, providing a useful tool for multiproduct synthesis in a single procedure. A possible reaction pathway is proposed based on mechanistic studies.