Sulfur-Mediated Decarboxylative Coupling of 2-Nitrobenzyl Alcohols and Arylacetic Acids
作者:Tung T. Nguyen、Nam T. S. Phan、Khang X. Nguyen、Duyen K. Nguyen、Phuc H. Pham、Ha V. Le
DOI:10.1055/s-0040-1707113
日期:2020.7
the use of urea as a nitrogen source, elemental sulfur as a promoter, DABCO as a base, and DMSO as a solvent. Functionalities such as chloro, fluoro, trifluoromethyl, thienyl, and indolyl groups were all compatible with the reaction conditions. Because our method uses stable simple substrates to obtain the N,N-heterocycles in the absence of transition metals, it offers a potential pathway for preparing
One-Pot Synthesis of 2-Arylquinazolines and Tetracyclic Isoindolo[1,2-<i>a</i>]quinazolines<i>via</i>Cyanation Followed by Rearrangement of<i>ortho</i>-Substituted 2-Halo-<i>N</i>-arylbenzamides
作者:Sachin D. Gawande、Manoj R. Zanwar、Veerababurao Kavala、Chun-Wei Kuo、R. R. Rajawinslin、Ching-Fa Yao
DOI:10.1002/adsc.201400505
日期:2015.1.12
2‐arylquinazoline derivatives and tetracylic isoindolo[1,2‐a]quinazoline via cyanation followed by rearrangement of ortho‐substituted 2‐halo‐N‐arylbenzamides is described. Using dimethyl sulfoxide (DMSO) as the solvent, the cleavage of the tetracyclic isoindole fused quinazoline leads to the formation of 2‐arylquinazoline derivatives. When 1,4‐dioxane is used as the solvent, tetracyclic isoindole fused
An efficient three-component domino reaction of 2-bromoaldehydes, benzylamines, and sodium azide has been developed for the synthesis of quinazoline derivatives. This dominoprocess involves copper-catalyzed SNAr, oxidation/cyclization, and denitrogenation sequences. The mild catalytic system enabled the effective construction of three C–N bonds in one operation.
已经开发了2-溴醛,苄胺和叠氮化钠的有效的三组分多米诺反应,用于合成喹唑啉衍生物。这种多米诺骨牌工艺涉及铜催化的S N Ar,氧化/环化和脱氮序列。温和的催化系统使一次操作即可有效构建三个C–N键。
Iron‐Based Imidazolium Salt as Dual Lewis Acid and Redox Catalyst for the Aerobic Synthesis of Quinazolines
作者:Mario Martos、Isidro M. Pastor
DOI:10.1002/ejoc.202200839
日期:2022.9.27
An efficient and sustainable protocol for the preparation of quinazolines by means of a condensation-cyclization-oxidation reaction sequence promoted by an iron-imidazolium catalyst has been developed and fully assessed in terms of environmental impact.
We report here a transition metal-free synthesis of quinazoline derivatives starting from 2-aminobenzyl alcohols and aryl amides via an alcohol dehydrogenation strategy promoted by potassium tertiary butoxide. The control experiments are carried out to identify the reaction intermediates and the role of the K+ ion in the reaction. The DFT calculations unveil the reaction mechanism, with special focus
我们在这里报告了一种无过渡金属合成喹唑啉衍生物的方法,从 2-氨基苄醇和芳基酰胺开始,通过叔丁醇钾促进的醇脱氢策略。进行对照实验以确定反应中间体和 K +离子在反应中的作用。DFT 计算揭示了反应机制,特别关注速率决定状态。本方法可容忍多种官能团,可轻松获得不同取代的喹唑啉。