Results 51 to 60 of about 2,950 (153)

Advances of Ugi reaction in natural product synthesis

open access: yesGreen Synthesis and Catalysis
The Ugi multicomponent reaction represents a highly efficient synthetic transformation, wherein all four reactants (isocyanides, amine, aldehyde or ketone and a nucleophile) are combined in one pot under mild conditions. This reaction exhibits remarkable
Wen Zhang   +4 more
doaj   +1 more source

Phosphoranaloga von Aminosäuren und Peptiden: β-Lactam-Grundgerüst mit Aminomethylphosphonsäure

open access: yesCHIMIA, 1984
Syntheses of β-lactams containing aminomethylphosphonate involving the Ugi-reaction of diethylisocyanmethylphosphonate 4 with carbonyl compounds 3 and β-alanine are reported.
Janusz Rachoń
doaj   +1 more source

A Novel Class of Small Molecule Agonists with Preference for Human over Mouse TLR4 Activation. [PDF]

open access: yesPLoS ONE, 2016
The best-characterized Toll-like receptor 4 (TLR4) ligands are lipopolysaccharide (LPS) and its chemically modified and detoxified variant, monophosphoryl lipid A (MPL).
Jason D Marshall   +13 more
doaj   +1 more source

Synthesis, Characterization and Chemistry of Tetrakis(Propargylisocyanide) Copper(I) Complex

open access: yesMolbank, 2023
The kinetically unstable propargylisocyanide was reacted with the tetrakis(acetonitrile) copper(I) hexafluorophosphate and the formed complex was then involved in a copper-catalyzed alkyne-azide cycloaddition reaction (CuAAC). After the decomplexation of
Alexandre Quelhas   +3 more
doaj   +1 more source

Optimizing Benefits‐Harms of H. pylori Screen‐and‐Treat Programs Tailored to the Regional Settings

open access: yesHelicobacter, Volume 31, Issue 2, March/April 2026.
ABSTRACT This article outlines how decision modeling can be used to optimize the cost‐effectiveness of H. pylori screen‐and‐treat programs. Decision models enable the translation of data from pilot studies into locally tailored strategies by adapting test modalities, treatment options, and the need to retest specific to the local setting.
Duco T. Mülder   +5 more
wiley   +1 more source

In Silico and in Vitro Studies of Fluorinated Chroman-2-Carboxilic Acid Derivatives as an Anti-tubercular Agent

open access: yesFolia Medica, 2018
Background: Despite the use of traditional method, Ugi reaction currently is a well-established multicomponent reaction. Chromane motif itself possesses a variety of biological functions.
Kapadiya Khushal M.   +3 more
doaj   +1 more source

Direct‐to‐Biology: Streamlining the Path From Chemistry to Biology in Drug Discovery

open access: yesChemMedChem, Volume 21, Issue 4, 25 February 2026.
Crude yet clever: Direct‐to‐biology workflows exploit nanoscale synthesis and plate‐based assays to accelerate hit discovery, save precious intermediates, and rethink early drug discovery. Direct‐to‐biology (D2B) has emerged as a transformative concept in early drug discovery, defined by the direct on‐target screening of crude reaction mixtures without
Ariane F. Hübner, Fabian Barthels
wiley   +1 more source

Cirrhosis of Liver in Patients With Dyskeratosis Congenita: A Report of Two Cases

open access: yesClinical Case Reports, Volume 14, Issue 2, February 2026.
Classical mucocuaneous triad of dyskeratosis congenita in a patient with decompensated cirrhosis. ABSTRACT Dyskeratosis congenita (DC) is a genetic disorder characterized by multisystem involvement. The most commonly affected systems are the mucocutaneous, bone marrow, and lungs.
Bigyan Maharjan   +8 more
wiley   +1 more source

Synthesis of Oligo‐Sulfonimidates by Exponential Growth via Sulfur‐Phenolate Exchange Reactions

open access: yesChemistryEurope, Volume 4, Issue 2, February 2026.
A highly flexible iterative exponential growth strategy is used in combination with the sulfur‐phenolate exchange reaction to develop sequence‐defined oligosulfonimidates (16 mer). Combining this with sulfur‐fluorine exchange‐based iterative step growth, a bespoke 20 mer (Mw = 8.5 kDa) can be synthesized.
Yu Han   +5 more
wiley   +1 more source

Recent Contributions of Organic Synthesis to Forensic Science

open access: yesChemPlusChem, Volume 91, Issue 2, February 2026.
Forensic science is a multidisciplinary field that plays a vital role in providing scientific evidence for criminal investigations. This review highlights advances and opportunities at the interface between organic synthesis and forensic science, with applications in drug identification, forensic toxicology, and latent fingerprint detection and ...
Gustavo dos Santos Martins   +3 more
wiley   +1 more source

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