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
Sustainable methine sources for the synthesis of heterocycles under metal- and peroxide-free conditions
作者:Gopal Chandru Senadi、Vishal Suresh Kudale、Jeh-Jeng Wang
DOI:10.1039/c8gc03839b
日期:——
identified as sustainable methine sources for synthesizing quinazolinone and benzimidazole derivatives using a combination of TsOH·H2O/O2 and appropriate bis-nucleophiles for the first time. Deuterium labeling studies clearly proved that the C2 hydrogen of the synthesized heterocycles came from the methine source. These unique reaction conditions were successfully applied to the synthesis of echinozolinone
首次将TsOH·H 2 O / O 2和适当的双亲核试剂组合使用,将醇和醚确定为可持续的次甲基来源,用于合成喹唑啉酮和苯并咪唑衍生物。氘标记研究清楚地证明了合成杂环的C 2氢来自次甲基。这些独特的反应条件已成功地用于合成棘金龙酮(2e'),2f'(rutaecarpine和(±)evodiamine的常见前体)和二咪唑(6d)。该方法的显着特征包括低毒性,使用商业原料作为底物,成本低,对官能团的耐受性强以及对多种双亲核起始原料的适用性。
Glyoxylic acid in the reaction of isatoic anhydride with amines: a rapid synthesis of 3-(un)substituted quinazolin-4(3H)-ones leading to rutaecarpine and evodiamine
A dual reactant/catalyst role of glyoxylic acid in the reaction of isatoic anhydride with various amines afforded a novel, robust and rapid synthesis of 3-(un)substituted quinazolin-4(3H)-ones. This metal catalyst-free reaction proceeds via an unusual and unexpected cleavage of C–C bond. A shorter and common route to two alkaloids, that is, rutaecarpine and evodiamine is also accomplished.
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.
Pd/Fe<sub>3</sub>O<sub>4</sub> supported on nitrogen-doped reduced graphene oxide for room-temperature isocyanide insertion reactions
作者:Karandeep Singh、Ajay K. Singh、Devendra Singh、Rakhi Singh、Siddharth Sharma
DOI:10.1039/c5cy01973g
日期:——
graphene oxide (N-rGO) catalyst was developed to carry out the synthesis of quinazolinones and phenanthridines under extremely mild conditions through isocyanideinsertion cascades. The supported Pd/Fe3O4 nanoparticles could be easily recovered from the reaction mixture and reused several times without any loss in catalytic activity.
开发了一种多功能的Pd / Fe 3 O 4负载在N掺杂的还原氧化石墨烯(N-rGO)催化剂上,以在极温和的条件下通过异氰酸酯插入级联反应进行喹唑啉酮和菲啶的合成。负载的Pd / Fe 3 O 4纳米颗粒可以很容易地从反应混合物中回收并重复使用数次,而不会降低催化活性。