Anti-MRSA drug discovery by ligand-based virtual screening and biological evaluation
作者:Xu Lian、Zhonghua Xia、Xueyao Li、Pavel Karpov、Hongwei Jin、Igor V. Tetko、Jie Xia、Song Wu
DOI:10.1016/j.bioorg.2021.105042
日期:2021.9
S. aureusresistant to methicillin (MRSA) is one of the most-concerned multidrug resistant bacteria, due to its role in life-threatening infections. There is an urgent need to develop new antibiotics against MRSA. In this study, we firstly compiled a data set of 2,3-diaminoquinoxalines by chemical synthesis and antibacterialscreeningagainst S. aureus, and then performed cheminformatics modeling and
Using Calcium Carbide as an Acetylene Source for Cascade Synthesis of Pyrrolo[2,3-<i>b</i>
]quinoxalines <i>via</i>
Copper-Free <i>Sonogashira</i>
Coupling Reaction
A palladium‐catalyzed cascade protocol has been established for the synthesis of 4‐methyl‐1‐(1H‐pyrrolo[2,3‐b]‐quinoxalin‐2‐yl)cyclohexanols and 2‐phenyl‐1‐(1H‐pyrrolo[2,3‐b]quinoxalin‐2‐yl)propan‐1‐ols through the reaction of N‐alkyl(aryl)‐3‐chloroquinoxalin‐2‐amines with calcium carbide and cyclohexanones or 2‐phenylpropanal. This one‐pot process, carried out without any copper salt in the key step
钯催化的级联协议已建立的4-甲基-1-(1-合成ħ吡咯并[2,3- b ] -喹喔啉-2-基)环己醇和2-苯基-1-(1- ħ -吡咯并[2,3 - b ]喹喔啉-2-基)丙-1-醇通过N-烷基(芳基)-3-氯喹喔啉-2-胺与碳化钙和环己酮或2-苯基丙醛的反应而形成。此一锅法在Sonogashira偶联反应的关键步骤中不使用任何铜盐进行,提供了一种在催化量存在下合成2,3-二取代吡咯并[2,3- b ]喹喔啉的有效方法Pd(PPh 3)2 Cl 2的含量在DMSO / H 2 O中的产率很高。该策略的好处是使用市售的,廉价的和危害较小的主要化学原料碳化钙作为湿溶剂中的乙炔源。
Regioselective synthesis of 2,3-disubstituted 1-alkyl pyrrolo[2,3-b] quinoxalines through palladium-catalyzed Heck reaction of chalcones and evaluation of their anti-bacterial activities
The regioselective synthesis of 1-alkyl-2-aryl-3-acyl pyrrolo[2,3-b]quinoxalines through palladium-catalyzed Heck coupling reaction/heteroannulation was reported. The reaction of N-alkyl/benzyl-3-chloroquinoxaline-2-amines with chalcones catalyzed by Pd(OAc)2 in the presence of KOtBu, as the base, in DMSO afforded the desired products in good-to-high yields. The MIC and MBC determinations revealed
报道了通过钯催化的Heck偶联反应/杂环化反应的1-烷基-2-芳基-3-酰基吡咯并[2,3- b ]喹喔啉的区域选择性合成。的反应ñ -烷基/苄基-3-氯喹喔啉-2-胺与通过将Pd(OAC)催化查耳酮2在KO的存在吨卜,作为碱,在DMSO中,得到良好的到高的产率的期望的产物。MIC和MBC的测定表明,这些化合物可用于未来开发抗生素的研究工作中。
Novel one-pot synthesis of 1-alkyl-2-(aryloxy)methyl-1H-pyrrolo[2,3-b]quinoxalines via copper-free Sonogashira coupling reaction
efficient protocol is described for the synthesis of 1-alkyl-2-(aryloxy)methyl-1H-pyrrolo[2,3-b]quinoxalines via the one-pot reaction of phenol or 2-naphthol derivatives, propargyl bromide, and N-alkyl-3-chloroquinoxaline-2-amines in the presence of palladium catalyst. This one-pot reaction is carried out in the absence of any copper salt at room temperature. The reaction product is dependent on the nature
摘要描述了一种新颖,简单而有效的方案,用于通过苯酚或2-萘酚衍生物的一锅反应合成1-烷基-2-(芳氧基)甲基-1 H-吡咯并[2,3- b ]喹喔啉,炔丙基溴和N-烷基-3-氯喹喔啉-2-胺在钯催化剂的存在下。该一锅法反应在室温下在不存在任何铜盐的情况下进行。反应产物取决于所用碱的性质。使用吗啉作为碱,得到最终的环化产物,而三乙胺仅得到偶联产物。 图形概要
Rapid Synthesis of 2-Alkanol-substituted Pyrrolo[2,3-<i>b</i>
]quinoxalines from Propargylic Alcohols <i>via</i>
Copper-free Sonogashira Coupling Reaction at Room Temperature
efficient procedure is established for the synthesis of 2‐alkanol‐substituted pyrrolo[2,3‐b]quinoxalines by the reaction of N‐alkyl‐3‐chloroquinoxaline‐2‐amines with propargylic alcohols. The reaction is carried out in the absence of any copper salt but in the presence of a catalytic amount of Pd(PPh3)2Cl2 at room temperature. The Sonogashira coupling reaction step in this procedure is fast, producing
通过N-烷基-3-氯喹喔啉-2-胺与炔丙醇的反应,建立了一种实用且有效的程序,用于合成2-链烷醇取代的吡咯并[2,3- b ]喹喔啉。该反应在室温下在不存在任何铜盐但在催化量的Pd(PPh 3)2 Cl 2的存在下进行。此过程中的Sonogashira偶联反应步骤快速,可高产量生产清洁的产品,而不会受到不必要的均偶联Glaser反应产物的污染。还针对三种细菌菌株Luteus Luteus,铜绿假单胞菌(Pseudomonas aeruginosa),和枯草芽孢杆菌。