摘要在这项工作中,我们报告了从氮杂-金龙酸酯合成带有酰胺和磺酰胺骨架的新型吡唑衍生物。首先,中间体螺并吡唑啉是通过亚硝基胺与氮杂-金酮的高度区域选择性的1,3-偶极环加成反应获得的。随后,将获得的环加合物在热乙醇中经受盐酸处理,该热乙醇可传导生成5-(2-氨基苯甲酰基)-3,4-二芳基-1-苯基吡唑。最后,分别通过乙酸酐,苯甲酰氯和甲苯磺酰氯对中间体2-氨基苯甲酰基吡唑的作用分别获得目标化合物。使用IR,1 H NMR和13 C NMR以及质谱确定所有合成化合物的结构。 图形摘要据报道,新型合成杂环系统涵盖了来自氮杂-金酮的吡唑衍生物。在这项工作中使用的合成路线是有效和相关的,涉及1,3-偶极环加成和烷基化反应。结果表明,光谱数据符合所有合成化合物的结构。
A new method for converting 2-alkynyl arylazide derivatives into functionalized polysubstituted quinolines following a gold-catalyzed 1,3-acetoxy shift/cyclization/1,2-group shift sequence has been developed. This transformation proceeds under mild reaction conditions, is efficient, and tolerates a large variety of functional groups.
incompatibility of reaction conditions, when carbon dioxide was utilized as carbonyl source. Herein, a practical one-pot protocol using carbon dioxide as the carbonyl source for the palladium-catalyzed carbonylative Sonogashira coupling has been established, providing an expedient and practical route to a wide range of functionalized alkynones and indoxyls under mild reaction conditions. By finding a suitable
在过去的几年中,羰基化偶联反应已成为现代合成化学中构建含羰基化合物的强大而通用的策略。二氧化碳是一种可再生的单碳分子,近年来与二氧化碳相比,由于其丰度高、无毒和稳定性好,已成为最具吸引力和前景的羰基替代来源之一。然而,在大多数情况下,当二氧化碳被用作羰基源时,由于反应条件的复杂性和不相容性,通常需要双室技术来使产生 CO 和消耗 CO 的过程成功进行。在此,已经建立了使用二氧化碳作为钯催化羰基化 Sonogashira 偶联的羰基源的实用一锅方案,在温和的反应条件下为广泛的官能化炔酮和吲哚醇提供了一种方便实用的途径。通过找到合适的催化系统,该方法允许产生 CO 和消耗 CO 的过程在一个锅中进行,其中在没有任何氟化物试剂的情况下通过还原二氧化碳原位产生一氧化碳。该方法具有操作简单安全、底物易得、官能团耐受性好、反应条件温和等特点。其中一氧化碳是在没有任何氟化物试剂的情况下由二氧化碳的还原原
A general and convenient palladium-catalyzed synthesis of benzylideneindolin-3-ones with formic acid as the CO source
作者:Rui Li、Xinxin Qi、Xiao-Feng Wu
DOI:10.1039/c7ob01557g
日期:——
A general and convenient palladium-catalyzed carbonylative synthesis of 2-benzylideneindolin-3-ones from 2-iodoanilines and arylacetylenes has been developed. With formic acid as the CO source, a variety of 2-benzylideneindolin-3-ones were obtained in good to excellent yields with exceptional functional groups tolerance.
Novel base-initiated cascade reactions of hemiindigos to produce dipolar γ-carbolines and indole-fused pentacycles
作者:V. S. Velezheva、O. L. Babii、A. A. Khodak、E. A. Alekseeva、Yu V. Nelyubina、I. A. Godovikov、A. S. Peregudov、K. B. Majorov、B. V. Nikonenko
DOI:10.1039/c9ra07807j
日期:——
Novel continuous-flow cascade reactions are developed for producing 1,4-diaryl-disubstituted dipolar γ-carbolines 2 that contain a carboxylate group and their two pentacyclic precursors 6, 7 from hemiindigos 1. The nucleophilic and pro-electrophilic chemistry described is new to the hemiindigos 1, and it led to the discovery of antimycobacterial scaffold characteristic of rimino-type pentacycles 6
Crystallographic study, biological assessment and POM/Docking studies of pyrazoles-sulfonamide hybrids (PSH): Identification of a combined Antibacterial/Antiviral pharmacophore sites leading to in-silico screening the anti-Covid-19 activity
作者:Mohammed Chalkha、Asmae Nakkabi、Taibi Ben Hadda、Malika Berredjem、Abdelfattah El Moussaoui、Mohamed Bakhouch、Mohamed Saadi、Lahcen El Ammari、Faisal A. Almalki、Hamid Laaroussi、Violeta Jevtovic、Mohamed El Yazidi