Results 11 to 20 of about 11,747 (233)

Electrochemical TEMPO-Catalyzed Oxidative Ugi-Type Reaction [PDF]

open access: goldACS Organic & Inorganic Au, 2021
Oxidative isocyanide-based multicomponent reactions (oxidative IMCRs) are very useful tools for the rapid construction of molecular diversity starting from readily available and stable substrates. Despite all their benefits, such multicomponent reactions are underdeveloped and strictly limited to 3-component processes.
Na Pan   +4 more
doaj   +4 more sources

Direct polymerization of levulinic acid via Ugi multicomponent reaction [PDF]

open access: hybrid, 2016
A robust, direct and efficient approach has been developed for the utilization of levulinic acid (LevA) as a building block in the synthesis of polyamides.
Manuel Hartweg, C. Remzi Becer
openalex   +4 more sources

Unimolecular Exciplexes by Ugi Four-Component Reaction [PDF]

open access: yesFrontiers in Chemistry, 2019
Exciplex or excited complex emission is an excited state process, arising from considerable charge transfer of an excited energy donor to an acceptor, which can be identified by the occurrence of a redshifted emission band that is absent in the ...
Maria Ochs   +3 more
doaj   +4 more sources

Diastereoselective Ugi reaction of chiral 1,3-aminoalcohols derived from an organocatalytic Mannich reaction [PDF]

open access: yesBeilstein Journal of Organic Chemistry, 2016
Enantiomerically pure β-aminoalcohols, produced through an organocatalytic Mannich reaction, were subjected to an Ugi multicomponent reaction under classical or Lewis acid-promoted conditions with diastereoselectivities ranging from moderate to good ...
Samantha Caputo   +5 more
doaj   +2 more sources

Silver(I) triflate-catalyzed post-Ugi synthesis of pyrazolodiazepines [PDF]

open access: yesBeilstein Journal of Organic Chemistry
A silver(I) triflate-catalyzed post-Ugi assembly of novel pyrazolo[1,5-a][1,4]diazepine scaffolds is reported offering high yields (up to 98%) under mild conditions.
Muhammad Hasan   +6 more
doaj   +2 more sources

Synthesis of various N-heterocycles using the four-component Ugi reaction

open access: greenACS Combinatorial Science, 2019
Ugi four-component reactions (U-4CRs) are widely recognized as being highly efficient for the synthesis of pseudopeptides. However, the products of these reactions are not so interesting as drug candidates because they are not conformationally restricted enough for a potent interaction with biological targets.
Majid M. Heravı, Leyla Mohammadkhani
openalex   +4 more sources

Propargyl Amines: Versatile Building Blocks in Post‐Ugi Transformations

open access: yesChemistryOpen, 2023
The Ugi reaction, a multicomponent reaction, allows diversity‐oriented synthesis Its importance is recognized by an exponential increase in the publications utilizing the post‐Ugi transformations as a strategy to build complex molecules via simple and ...
Rinkal B. Bhoraniya, Dr. Sachin G. Modha
doaj   +1 more source

Turn-Induction in Peptides Incorporating Novel Cyrene-Derived α,α-Disubstituted Amino Acid. [PDF]

open access: yesJ Pept Sci
Novel chiral cyrene‐derived Cyr residues were incorporated into peptides. The α,α‐disubstituted amino acid residue was introduced using the Ugi reaction. X‐ray crystallographic analysis of R‐ and S‐Cyr residues indicated preference to adopt left‐ and right‐handed α‐helical conformations, respectively.
Bhowal KB, Hitti R, Lubell WD.
europepmc   +2 more sources

Recent Progress on Post-Ugi Reaction [PDF]

open access: bronzeChinese Journal of Organic Chemistry, 2017
Xiuming Li, Xueshun Jia, Liang Yin
openalex   +2 more sources

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