The present invention relates to novel hydroxamic acid derivatives useful as inhibitors of astacin metalloproteinases, in particular procollagen C-proteinase (PCP) enzymes, meprins, ovastacin and/or nematode astacins; more particularly human or mammalian meprin a, meprin β, BMP-1, ovastacin and/or DPY-31 from nematodes; pharmaceutical compositions comprising such compounds; methods for treatment or prophylaxis of diseases or conditions, especially such that are related to said metalloproteinases; and compounds and pharmaceutical compositions for use in such methods.
entry into the imidazopyridine scaffold, where building block prioritization was coupled to a new computational method for predicting ligand–target associations. We identified an innovative GPCR‐modulating combinatorial chemotype featuring ligand‐efficient adenosine A1/2B and adrenergic α1A/B receptor antagonists. Our results suggest the tight integration of microfluidics‐assisted synthesis with computer‐based
Groebke‐Blackburn‐Bienaymé Multicomponent Reaction Catalysed by Reusable Brønsted‐Acidic Ionic Liquids
作者:Nicolas S. Anjos、Agáta I. Chapina、Ana R. Santos、Peter Licence、Luiz S. Longo
DOI:10.1002/ejoc.202200615
日期:2022.10.26
Groebke-Blackburn-Bienaymé multicomponentreactions can be efficiently catalysed by Brønsted acidic ionicliquids for the synthesis of imidazo[1,2-a]pyridines and imidazo[2,1-b]thiazoles in moderate to excellent yields (42–93 %), either under thermal or microwave heating. The homogeneous acidic catalyst can be recycled and reused in four consecutive reaction cycles.
Brønsted 酸性离子液体可有效催化 Groebke-Blackburn-Bienaymé 多组分反应合成咪唑并[1,2- a ]吡啶和咪唑并[ 2,1- b ]噻唑,产率适中(42-93%) ,在热或微波加热下。均相酸性催化剂可以在四个连续的反应循环中回收和重复使用。
A Comparative Study on the Groebke-Blackburn-Bienaymé Three-Component Reaction Catalyzed by Rare Earth Triflates under Microwave Heating
作者:Gabriela Santos、Nicolas Anjos、Miguel Gibeli、Guilherme Silva、Pâmela Fernandes、Everton Fiorentino、Luiz Longo Jr.
DOI:10.21577/0103-5053.20200028
日期:——
Over the last twenty years. the Groebke-Blackburn-Bienayme (GBB) reaction has been emerged as a powerful tool to access different nitrogen-based heterocycles as privileged scaffolds in medicinal chemistry. This multicomponent reaction is usually catalyzed by ordinary Bronsted or Lewis acid catalysts. Herein, we present a comparative study on the catalytic efficiencies of different rare earth triflates in GBB reactions under microwave heating, involving 2-aminopyridine or 2-aminothiazole, as aminoazole component, and different aldehydes and aliphatic isocyanides. The use of gadolinium(III) triflate as cheaper alternative catalyst for the most commonly used scandium(III) titillate was acknowledged for the first time, and a library of twenty three imidazo[1,2-a]pyridines and imidazo[2,1-b]thiazoles could be obtained in good to excellent yields.
HPW-Catalyzed environmentally benign approach to imidazo[1,2-<i>a</i>]pyridines
作者:Luan A Martinho、Carlos Kleber Z Andrade
DOI:10.3762/bjoc.20.55
日期:——
activities. The most direct way of obtaining this nucleus is the Groebke–Blackburn–Bienaymé three-component reaction (GBB-3CR) between aminopyridines, aldehydes, and isocyanides under both Lewis and Brønsted acid catalysis. However, several catalysts for this reaction have major drawbacks such as being expensive, extremely dangerous, strong oxidizing, and even explosive. In this scenario, heteropolyacids