这是在有机铜(II)催化剂存在下从2到碘代苯甲酸和叠氮化钠合成喹喔啉的第一个报道的非常规高效策略。在本文中,已经通过施密特反应和亲核取代反应描述了一种非常简单,通用的一锅多组分方案,用于合成生物活性化合物喹喔啉。分离的化合物通过1 H NMR,13 C NMR表征。我们报道的有机催化剂通过单晶XRD,SEM表征。
[EN] MACROCYCLIC AND BICYCLIC INHIBITORS OF HEPATITIS C VIRUS<br/>[FR] INHIBITEURS MACROCYCLIQUES ET BICYCLIQUES DU VIRUS DE L'HÉPATITE C
申请人:GILEAD SCIENCES INC
公开号:WO2014145095A1
公开(公告)日:2014-09-18
Compounds of formula (I):or pharmaceutically acceptable salts thereof, wherein the various substituents are defined herein, methods of using said compounds, and pharmaceutical compositions containing said compounds.
The aerobic oxidation of α-hydroxy ketones into α-diketones catalyzed by CaO is compared with the same reaction catalyzed by other metal oxides. The catalytic activities of the various metal oxides were proportional to their surface basicities. The direct conversion of α-hydroxy ketones into quinoxalines via CaO-catalyzed aerobic oxidation followed by in situ reaction with 1,2-diaminoaromatics is also achieved. Various types of quinoxalines were synthesized in the presence of the CaO catalyst and molecular oxygen. It was also found that the CaO catalyst was reusable without any loss of its catalytic activity.
Homogeneous Nickel-Catalyzed Sustainable Synthesis of Quinoline and Quinoxaline under Aerobic Conditions
作者:Amreen K. Bains、Vikramjeet Singh、Debashis Adhikari
DOI:10.1021/acs.joc.0c01819
日期:2020.12.4
efficient route toward the synthesis of a plethora of heterocyclic rings. Herein, we report an efficacious, nickel-catalyzed synthesis of two important heterocycles such as quinoline and quinoxaline. The catalyst is molecularly defined, is phosphine-free, and can operate at a mild reaction temperature of 80 °C. Both the heterocycles can be easily assembled via double dehydrogenative coupling, starting
基于脱氢偶合的反应已成为合成大量杂环的有效途径。本文中,我们报道了两个重要杂环(如喹啉和喹喔啉)的高效,镍催化合成。该催化剂是分子定义的,不含膦,可以在80°C的温和反应温度下运行。两个杂环可以容易地组装经由在较短的反应时间内,分别从2-氨基苄醇/ 1-苯乙醇和二胺/二醇开始的双脱氢偶联。这种使用廉价催化剂的环境友好的合成方案可以与许多其他为制造两个推定的杂环而开发的过渡金属系统相媲美。从机理上讲,仲醇的脱氢遵循干净的拟一级动力学,并表现出相当大的动力学同位素效应。有趣的是,这种催化剂提供了一个将捕获的氢存储在配体主链中,避免形成金属氢化物的例子。在好氧/ O 2氧化作用下,催化剂的氧化形式易于再生,从而使该方案变得环保且易于处理。
[EN] INHIBITORS OF HEPATITIS C VIRUS<br/>[FR] INHIBITEURS DU VIRUS DE L'HÉPATITE C
申请人:GILEAD SCIENCES INC
公开号:WO2014008285A1
公开(公告)日:2014-01-09
Compounds of Formula I are disclosed, As well as pharmaceutically acceptable salts thereof. Methods of using said compounds and pharmaceutical compositions containing said compounds are also disclosed.
化合物I的结构已经披露,以及其药用盐。还披露了使用这些化合物的方法和含有这些化合物的药物组合物。
Pd-Catalyzed, Ligand-Enabled Stereoselective 1,2-Iodine(III) Shift/1,1-Carboxyalkynylation of Alkynylbenziodoxoles
A PdII‐catalyzed 2:1 coupling reaction of alkynylbenziodoxole with carboxylic acid to afford (alk‐1‐en‐3‐ynyl)benziodoxole, which is efficiently promoted by an octahydrophenazine ligand, is reported. The reaction involves a Pd‐assisted 1,2‐iodine(III) shift of the alkynylbenziodoxole followed by stereoselective introduction of carboxy and alkynyl groups (the latter originating from another molecule