首次描述了喹唑啉-4(3 H )-与苄基卤化物和烯丙基卤化物的有效且可见光促进的级联N-烷基化/酰胺化,以提供对喹唑啉-2,4(1 H)的便捷途径,3 H )-二酮。这种级联N-烷基化/酰胺化反应显示出良好的官能团耐受性,也可应用于 N-杂环,如苯并 [ d ] 噻唑、苯并 [ d ] 咪唑和喹唑啉。对照实验表明,K 2 CO 3在这种转化中起着重要作用。
A highly efficient TMSCl-mediated addition of N-nucleophiles to isocyanides has been achieved.
一种高效的TMSCl介导的N-亲核试剂加成到异氰酸酯的方法已经实现。
Green Synthesis of Quinazolinone Derivatives Catalyzed by Iodine in Ionic Liquid
作者:Shu-Liang Wang、Ke Yang、Chang-Sheng Yao、Xiang-Shan Wang
DOI:10.1080/00397911.2010.524340
日期:2012.2.1
Abstract A series of quinazolinone derivatives were synthesized by the reaction of 2-aminobenzamides and triethyl orthoformate or triphosgene in ionicliquid of [BMIm]BF4 at 80 °C catalyzed by iodine in good yields. Compared to other methods, this new procedure has the advantages of mild reaction conditions, good yields, operational simplicity, and environmentally friendly procedure. GRAPHICAL ABSTRACT
A selective functionalization of C–C═C bonds toward N–C═O bonds is realized by an n-Bu4NI-catalyzed reaction of 3-methylindoles with primaryamines using TBHP as the unique oxidant. The systematic process involves oxygenation, nitrogenation, ring-opening, and recyclization, affording a broad range of quinazolinones in good to excellent yields.
Via an imine-protection strategy, we herein present an unprecedented copper-catalyzed oxidative multicomponent annulation reaction for directsynthesis of quinazolinones. The construction of various products is achieved via formation of three C–N and one C–C bonds in conjunction with the benzylic functionalization. The merits of easily available feedstocks, naturally abundant catalyst, good functional
tert-Butyl Hydroperoxide Promoted the Reaction of Quinazoline-3-oxides with Primary Amines Affording Quinazolin-4(3<i>H</i>)-ones
作者:Jin Luo、Juelin Wan、Lianlian Wu、Lingyun Yang、Tao Wang
DOI:10.1021/acs.joc.2c00898
日期:2022.8.5
synthesis of quinazolin-4(3H)-ones via the reaction of quinazoline-3-oxides with primary amines is described. This approach is demonstrated to be applicable for a broad range of substrates and proceeds efficiently under metal-free and mild reaction conditions employing easily available tert-butyl hydroperoxide as the oxidant. Remarkably, 3-(2-(1H-indol-3-yl) ethyl)quinazolin-4(3H)-one 3w, which was conveniently
介绍了一种通过 quinazolin-3-氧化物与伯胺反应合成 quinazolin-4(3 H )-ones 的有效且简便的方法。这种方法被证明适用于广泛的底物,并且在使用容易获得的叔丁基过氧化氢作为氧化剂的无金属和温和的反应条件下有效地进行。值得注意的是,3-(2-(1 H -indol-3-yl) ethyl)quinazolin-4(3 H )-one 3w是通过该方法方便地以 70% 的收率获得的,是合成生物活性吴茱萸碱和鲁坦平。