2-(2-溴苯基)喹唑啉-4(3H)-one与元素硫反应合成7H-苯并[4,5]异噻唑并[3,2 - b ]喹唑啉-7-酮的有效方法描述了在无过渡金属条件下通过 N-S/C-S 键形成。该反应在简单的条件下顺利进行,以良好的收率得到相应的产物,并具有良好的官能团耐受性。此外,与 2-苯基相比,由于硫诱导的分子内共轭延伸,合成的 7H-苯并[4,5]异噻唑并[3,2- b ]喹唑啉-7-酮显示出增强的紫外-可见光吸收能力-quinazolin-4(3H)-one,表明这些分子在有机光吸收材料领域的潜在应用。
Iron-catalyzed oxidative synthesis of N-heterocycles from primary alcohols
作者:Dan Zhao、Yu-Ren Zhou、Qi Shen、Jian-Xin Li
DOI:10.1039/c3ra46363j
日期:——
An iron-catalyzed one-pot one-step oxidative system has been successfully developed in the conversion of primary alcohols into nitrogen-containing heterocycles, such as quinazolinone, quinazoline and 3,4-dihydro-2H-1,2,4-benzothiadiazine 1,1-dioxide derivatives.
在伯醇转化为含氮杂环(如喹唑啉酮,喹唑啉和3,4-二氢-2 H -1,2,4-苯并噻二嗪)中,已成功开发出铁催化的一锅一步氧化系统。1,1-二氧化物衍生物。
Pd-Catalyzed regioselective C–H halogenation of quinazolinones and benzoxazinones
A Pd-catalyzed ortho-selective halogenation of benzoxazinone and quinazolinone scaffolds have been described employing N-halosuccinimide as both halogen source and oxidant reagent via C−H bond activation. This transformation shows high chemo- and rigoselectivitiy and demonstrates a broad range of benzoxazinone and quinazolinone substrates with different functional groups and has been scaled up to gram
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.
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。