The cathodic reduction of N-acylureas with the structure R-NH-CO-N(COR')-R in an aprotic medium gives N-alkylamides (R'-CO-NH-R) and amines (R-NH2) in a selective cleavage process. The structure of the R' group is a significant factor of the electrochemical process.
A novel approach toward thioester bond formation mediated by <i>N,N<sup>’</sup></i>-diisopropylcarbodiimide in water
作者:Nadia Fattahi、Najmeh Varnaseri、Ali Ramazani
DOI:10.1080/10426507.2020.1799367
日期:2021.1.2
Abstract A simple and efficient method has been developed for the synthesis of thioesters from carboxylic acids and thiols using N,N'-diisopropylcarbodiimide (DIC). The reactions were carried out in water as an environmentally friendly and green solvent. The developed procedure presents an economic, efficient, mild, and very simple protocol for thioesterification reaction in aqueous media. Graphical
Reactions of benzoic acid derivatives and (E)-cinnamic acid derivatives with $N,N^\prime }$ -dialkyl carbodiimide proceed smoothly at room temperature and in neutral conditions to afford N-acylurea derivatives in high yields. The reaction proceeds smoothly and cleanly under mild conditions and no side reactions were observed.
Some reactions of 2-(4-substitutedphenyl)-2-(<i>N</i>-methyl-<i>N</i>-4-substitutedbenzamido) acetic acids
作者:Yaşar Dürüst、Hamza Karakuş、Benson M. Kariuki、David W. Knight
DOI:10.1080/00397911.2018.1489966
日期:2018.9.2
benzamides and p-substituted benzoic acids. In addition, a novel and efficient access to N-acyl urea derivatives is described by the reaction between 2-(4-substitutedphenyl)-2-(N-methyl-N-4-substitutedbenzamido)acetic acids and cyclohexyl, isopropyl carbodiimides in the presence of a base. The structures of all new products were identified on the basis of NMR and IR spectra, along with X-ray diffraction data
摘要 2-(4-取代苯基)-2-(N-甲基-N-4-取代苯甲酰氨基)乙酸与乙酸酐在2-硝基亚甲基噻唑烷存在下原位生成2,4-二芳基取代的münchnones,后者是最有可能充当碱,并出乎意料地发生 Dakin-West 型反应和同时发生的自氧化反应,导致 (E)-1-(N,4-二甲基苯甲酰胺基)-1-(4-氟苯基)prop-1 的形成-en-2-yl 乙酸盐、4-取代苯基-N-甲基-N-(4-取代苯甲酰基)苯甲酰胺和对-取代苯甲酸。此外,通过 2-(4-取代苯基)-2-(N-甲基-N-4-取代苯甲酰氨基)乙酸与环己基、异丙基碳二亚胺之间的反应,描述了一种新颖且有效的获得 N-酰基脲衍生物的方法。一个基地的存在。所有新产品的结构均基于 NMR 和 IR 光谱以及 X 射线衍射数据和 HRMS 测量进行鉴定。图形概要
<i>N</i>-Heterocyclic Carbene Catalyzed Oxidative Coupling of Aldehydes with Carbodiimides under Aerobic Conditions: Efficient Synthesis of <i>N</i>-Acylureas
The oxidativecoupling reaction of aldehydes with N,N′-disubstituted carbodiimides catalyzed by N-heterocyclic carbenes under aerobic conditions has been achieved. This reaction gives the corresponding N-acylurea derivatives in good to high yields. Various kinds of aldehydes including aliphatic ones and carbodiimides are applicable to this reaction.
Characterization of the Two Fundamental Conformations of Benzoylureas and Elucidation of the Factors That Facilitate Their Conformational Interchange
作者:Guillaume Lessene、Brian J. Smith、Robert W. Gable、Jonathan B. Baell
DOI:10.1021/jo900871a
日期:2009.9.4
The ability of the benzoylurea core to mimicαhelices relies on its ability to form an intramolecular hydrogen bond. The conformational behavior of benzoylureas is investigated in depth in this study via the use of NMR, IR, X-ray, and computational analysis. The results show that the closed conformation maintained by an intramolecular hydrogen bond is favored in most of the cases studied except when