Results 21 to 30 of about 29,916 (207)

Size-Induced Highly Selective Synthesis of Organometallic Rectangular Macrocycles and Heterometallic Cage Based on Half-Sandwich Rhodium Building Block

open access: yesMolecules, 2022
The controlled synthesis of organometallic supramolecular macrocycles cages remains interesting and challenging work in the field of supramolecular chemistry.
Li-Long Dang   +6 more
doaj   +1 more source

Symmetric Macrocycles by a Prins Dimerization and Macrocyclization Strategy [PDF]

open access: yesOrganic Letters, 2009
A tandem dimerization/macrocyclization reaction utilizing the Prins cyclization has been developed. This reaction develops molecular complexity through the formation of highly substituted dimeric tetrahydropyran macrocycles. Mild conditions utilizing rhenium(VII) catalysts were explored for aromatic substrates, while harsher Lewis acidic conditions ...
Michael R, Gesinski   +2 more
openaire   +2 more sources

Formation of a macrocycle from dichlorodimethylsilane and a pyridoxalimine Schiff base ligand

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2021
The reaction of dichlorodimethylsilane with a polydentate Schiff base ligand derived from pyridoxal and 2-ethanolamine yielded the macrocyclic silicon compound (8E,22E)-4,4,12,18,18,26-hexamethyl-3,5,17,19-tetraoxa-8,13,22,27-tetraaza-4,18-disilatricyclo[
Uwe Böhme   +2 more
doaj   +1 more source

Macrocyclic Drugs and Synthetic Methodologies toward Macrocycles [PDF]

open access: yesMolecules, 2013
Macrocyclic scaffolds are commonly found in bioactive natural products and pharmaceutical molecules. So far, a large number of macrocyclic natural products have been isolated and synthesized. The construction of macrocycles is generally considered as a crucial and challenging step in the synthesis of macrocyclic natural products.
Xufen Yu, Dianqing Sun
openaire   +3 more sources

A heterometallic macrocycle as a redox-controlled molecular hinge [PDF]

open access: yes, 2015
The ability to modify the structure of nanoscopic assemblies in a controlled fashion is an important prerequisite for the creation of functional supramolecular systems.
Schouwey, Clément   +7 more
core   +1 more source

A 26-Membered Macrocycle Obtained by a Double Diels–Alder Cycloaddition Between Two 2H-Pyran-2-one Rings and Two 1,1'-(Hexane-1,6-diyl)bis(1H-pyrrole-2,5-dione)s

open access: yesActa Chimica Slovenica, 2017
With the application of a double dienophile 1,1'-(hexane-1,6-diyl)bis(1H-pyrrole-2,5-dione) for a [4+2] cycloaddition with a substituted 2H-pyran-2-one a novel 26-membered tetraaza heteromacrocyclic system 3 was prepared via a direct method under solvent-
Bor Lucijan Turek   +3 more
doaj   +1 more source

Investigation of Structural Mimetics of Natural Phosphate Ion Binding Motifs

open access: yesMolecules, 2015
Phosphates are ubiquitous in biology and nearly half of all proteins interact with their partners by means of recognition of phosphate residues. Therefore, a better understanding of the phosphate ion binding by peptidic structures is highly desirable ...
Evgeny A. Kataev, Tatiana A. Shumilova
doaj   +1 more source

Chemoenzymatic Synthesis of Select Intermediates and Natural Products of the Desferrioxamine E Siderophore Pathway

open access: yesMolecules, 2022
The NIS synthetase family of enzymes responsible for the biosynthesis of siderophores is increasingly associated with bacterial virulence. Proteins in this class represent outstanding potential drug targets, assuming that basic biochemical and structural
Katherine M. Hoffmann   +5 more
doaj   +1 more source

Development of macrocycle-based ligands for challenging disease targets

open access: yes, 2022
reservedMacrocycles are a promising class of therapeutics because they can bind targets considered undruggable with small molecules. A focused KRAS macrocycle library designed and synthesized to make smaller and potent KRAS (G12D) inhibitors using the ...
COVATO, ELENA
core  

Magnesium porphyrazine with peripheral methyl (3,5-dibromophenylmethyl)amino groups – synthesis and optical properties

open access: yesHeterocyclic Communications, 2019
Novel magnesium(II) porphyrazine with peripheral methyl(3,5-dibromophenylmethyl)amine groups was synthesized in a multi-step procedure starting from commercially available diaminomaleonitrile. All intermediates and the final macrocycle were characterized
Wieczorek Ewelina   +5 more
doaj   +1 more source

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