Iron-catalyzed aerobic oxidativefunctionalization of sp3 C–Hbonds has been developed for the construction of N-heterocycles from easily available carboxylic acid derivatives and o-substituted anilines. This transformation represents a widely applicable protocol to N-heterocycles using biofriendly iron as a catalyst in combination with molecular oxygen or air as the sole oxidant.
Rapid assembly of quinazolinone scaffold via copper-catalyzed tandem reaction of 2-bromobenzamides with aldehydes and aqueous ammonia: application to the synthesis of the alkaloid tryptanthrin
作者:Shenghai Guo、Yan Li、Li Tao、Wenwen Zhang、Xuesen Fan
DOI:10.1039/c4ra10799c
日期:——
procedure for the preparation of 2-substituted and 2,3-disubstituted quinazolinones was achieved through copper-catalyzed tandem reaction of 2-bromobenzamides with aldehydes and aqueous ammonia under air. Control experimental results indicated that this tandem reaction is triggered by a copper-catalyzed direct amination of 2-bromobenzamides with aqueous ammonia, followed by cyclocondensation and oxidative
Highly Efficient and Convenient Synthesis of Quinazolin-4(3H)-one Derivatives Catalyzed by Zinc Ferrite under Solvent-Free Conditions
作者:P. E. More、M. S. Gulumkar、P. M. Hetkale、S. L. Khillare、B. P. More
DOI:10.1134/s107042802304022x
日期:2023.4
Abstract A simple and highly efficient method for the synthesis of 2-substituted quinazolinone derivatives was developed by using zincferrite as a catalyst undersolvent-freeconditions in open airatmosphere. The moderate reaction conditions, good or excellent yield of products, short reaction times, and simple workup procedure are the main advantages of this method. Moreover, the catalyst (ZnFe2O4)
摘要 以铁酸锌为催化剂,在露天无溶剂条件下,开发了一种简单高效的2-取代喹唑啉酮衍生物的合成方法。该方法的主要优点是反应条件温和、产物收率良好或优异、反应时间短、后处理程序简单。此外,催化剂(ZnFe 2 O 4 )可以通过简单的过滤而容易地分离。催化剂回收率大于92%。回收的催化剂可以使用至少三次而活性没有明显损失。
Synthesis of Quinazolinones and Benzothiazoles Using α-Keto Acids under Ball Milling
作者:Anoop Sharma、Jitender Singh、Anuj Sharma
DOI:10.1021/acs.joc.3c02435
日期:2024.4.19
(23 derivatives) and benzothiazoles (23 derivatives) has been developed through stainless-steel-driven decarboxylative acyl radical generation from α-keto acids. A library of 2-arylquinazolinones and 2-arylbenzothiazoles has been prepared in moderate to good yields at room temperature. Moreover, control experiments and XPS studies supported the reduction (by zerovalent iron) of molecular oxygen through
机械化学是指通过机械力(例如铣削、研磨或剪切)引发化学反应以实现化学转变。作为机械催化的体现,本文通过不锈钢驱动的 α-酮酸脱羧酰基自由基生成,开发了一种无氧化剂和无溶剂的喹唑啉酮(23 种衍生物)和苯并噻唑(23 种衍生物)的合成方法。 2-芳基喹唑啉酮和2-芳基苯并噻唑库已在室温下以中等至良好的产率制备。此外,控制实验和 XPS 研究支持通过球的适度磨损来还原分子氧(通过零价铁),从而通过 SET 过程促进超氧自由基阴离子的生成。