Results 31 to 40 of about 6,559 (227)

Macrolactamas bioativas e síntese de macrociclos por reação de carbociclização radicalar mediada por hidreto de tri-n-butilestanho Bioactive macrolactams and synthesis of macrocycles by tri-n-butyltin hydride-mediated radical carbocyclization reaction

open access: yesQuímica Nova, 2008
This review presents natural, semi-synthetic and synthetic bioactive macrolactams and their structure-activity relationships when available. For macrolactams in clinical use the advantages and disadvantages in relation to other drugs are presented, and ...
Renata Fontes Prado Faraco   +3 more
doaj   +1 more source

Azumamides A-E: Isolation, Synthesis, Biological Activity, and Structure–Activity Relationship

open access: yesMolecules, 2022
Cyclic peptides are one of the important chemical groups in the HDAC inhibitor family. Following the success of romidepsin in the clinic, naturally occurring cyclic peptides with a hydrophilic moiety have been intensively studied to test their function ...
Sooheum Jo   +4 more
doaj   +1 more source

Recent Reports of Solid-Phase Cyclohexapeptide Synthesis and Applications

open access: yesMolecules, 2018
Macrocyclic peptides are privileged scaffolds for drug development and constitute a significant portion of macrocyclic drugs on the market today in fields spanning from infectious disease to oncology.
Allan M. Prior   +3 more
doaj   +1 more source

Non‐Buckling Stacks of Nanocarbon Molecules

open access: yesAngewandte Chemie, EarlyView.
A nanometer‐sized nanocarbon molecule with a central octagon was synthesized by optimizing a tetrameric macrocyclization via concentration‐dependent yield analysis (CYAN). The slightly contorted molecular structure was found to be frozen in a dimeric stack in solution, whereas dissociation into monomers liberated the molecule to undergo buckling ...
Koki Ikemoto   +8 more
wiley   +2 more sources

Syntheses of Acyclic and Macrocyclic Compounds Derived from 9,9‐Diethylfluorene (Part I)

open access: yesChemistryOpen, 2020
A series of new 9,9‐diethylfluorenes consisting of three side‐arms each bearing a heterocyclic, bis(carboxymethyl)amino, bis(carbamoylmethyl)amino, bis(ethoxycarbonylmethyl)amino or an amino group were prepared on the basis of 2,4,7‐tris(bromomethyl)‐9,9‐
Pierre Seidel, Prof. Dr. Monika Mazik
doaj   +1 more source

Two-Step Hantzsch Based Macrocyclization Approach for the Synthesis of Thiazole-Containing Cyclopeptides

open access: yes, 2016
Macrocyclization via an efficient high-yielding solid-phase intramolecular thioalkylation reaction is described. The reaction of S-nucleophiles with newly generated N-terminal 4-chloromethyl thiazoles led to the desired macrocyclization products 5 in ...
Jason E. Fenwick (2250076)   +2 more
core   +2 more sources

Multicopper Clusters Catalyze the Oxidative Phenol Macrocyclization (OxPM) of Linear Peptides [PDF]

open access: yes, 2023
The biosynthesis of glycopeptide antibiotics such as vancomycin and other biologically active biaryl-bridged and diaryl ether-linked macrocyclic peptides includes key enzymatic oxidative phenol macrocyclization(s) of linear precursors.
Mor, Ben-Lulu   +8 more
core   +1 more source

Noncanonical Peloruside A Biosynthesis by an Uncultivated Verrucomicrobiota Symbiont

open access: yesAngewandte Chemie, EarlyView.
Noncanonical biochemistry of the peloruside PKS characterized in this work, comprising double bond generation by a noncanonical tridomain (blue), acetyl‐CoA recycling (orange), and proofreading systems (purple and yellow). The Z‐double bond is installed by TEB1 through O‐acetylation and acetate elimination. The acyl ligase PelB (AL, orange) selectively
Amy E. Fraley   +11 more
wiley   +2 more sources

First synthesis of cryptands with sucrose scaffold

open access: yesBeilstein Journal of Organic Chemistry, 2019
Cryptands with sucrose scaffold, an unknown class of such derivatives, were prepared from the readily available 2,3,3’,4,4’-penta-O-benzylsucrose and 1’,2,3,3’,4,4’-hexa-O-benzylsucrose.
Patrycja Sokołowska   +2 more
doaj   +1 more source

Synthesis of novel sulfide-based cyclic peptidomimetic analogues to solonamides

open access: yesBeilstein Journal of Organic Chemistry, 2019
Eight new sulfide-based cyclic peptidomimetic analogues of solonamides A and B have been synthesized via solid-phase peptide synthesis and SN2’ reaction on a Morita–Baylis–Hillman (MBH) residue introduced at the N-terminal of a tetrapeptide.
José Brango-Vanegas   +7 more
doaj   +1 more source

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