Macrocycles are often described as molecules and ions containing a ring of twelve or more atoms. Classical examples include the crown ethers, calixarenes...

view of heme, a complex of a protoporphyrin IX. A macrocycle of 40 porphyrin molecules, model A macrocycle of 40 porphyrin molecules, STM image A geoporphyrin...

consisting of a dumbbell-shaped molecule which is threaded through a macrocycle (see graphical representation). The two components of a rotaxane are kinetically...

time up into three types of cycles: microcycle, mesocycle, and macrocycle. A macrocycle refers to a season of training in its entirety. It is an annual...

regular use.[citation needed] The term macrocycle is used for compounds having a rings of 8 or more atoms. Macrocycles may be fully carbocyclic (rings containing...

Cyclic peptides are polypeptide chains which contain a circular sequence of bonds. This can be through a connection between the amino and carboxyl ends...

hemoglobin and chlorophyll. In these two molecules, in particular, the pyrrole macrocycle ring frames a metal atom, that forms a coordination compound with the...

interlocked molecular architecture consisting of two or more interlocked macrocycles, i.e. a molecule containing two or more intertwined rings. The interlocked...

of the macrocycle ring absorbs visible light. The nature of the central metal can also influence the absorption spectrum of the metal-macrocycle complex...

E (May 1980). "Biosynthesis of the pigments of life: formation of the macrocycle". Nature. 285 (5759): 17–21. Bibcode:1980Natur.285...17B. doi:10.1038/285017a0...

iron atom is at the centre of a porphyrin macrocycle, bound to four nitrogen atoms of the tetrapyrrole macrocycle. The very stable dimethylglyoximate complex...

1002/14356007.e08_e02. ISBN 978-3527306732. Gu A, Wheate N (2021). "Macrocycles as drug-enhancing excipients in pharmaceutical formulations". Journal...

as covalent organic frameworks, molecular knots, polymers, and novel macrocycles. Not to be confused with dynamic combinatorial chemistry, DCvC concerns...

cations tend to form stronger complexes, but when large polydentate macrocycles are involved the trend is reversed. Though calcium is in the same group...

6-spiroacetal (1,7-dioxaspiro[5,5]-undecanyl) moiety connected to one side of the macrocycle. Widely-studied 26-membered oligomycins/rutamycins, 24-membered dunaimycins...

cyclizes the molecule, yielding the unbound product, prerapamycin. The core macrocycle, prerapamycin (figure 2), is then modified (figure 3) by an additional...

Michel (1999). "Gold(I) and Gold(0) Complexes of Phosphinine‐Based Macrocycles". Angewandte Chemie International Edition. 38 (21): 3194–3197. doi:10...

charge-transfer complexes. Porphyrins have conjugated molecular ring systems (macrocycles) that appear in many enzymes of biological systems. As a ligand, porphyrin...

anemia. Fludara (Fludarabine), for leukemia. Mozobil (Plerixafor), for macrocycle, approved by the FDA for peripheral blood stem cell mobilizer for non-Hodgkin's...

A cyanostar (pentacyanopentabenzo[25]annulene) is a shape-persistent macrocycle that binds anions. The cyanostar structure is synthesized in a one-pot...

natural products such as heme. Pyrroles are components of more complex macrocycles, including the porphyrinogens and products derived therefrom, including...

some amino acids, such as glycine. Heme B is the porphyrin derivative macrocycle molecule that holds the iron atom in place in hemoglobin, allowing for...

ditosylates: TsN(CH2CH2NTsNa)2 + TsN(CH2CH2OTs)2 → (TsNCH2CH2)4 The resulting macrocycle can be deprotected with strong acid. Base gives the tetramine. High dilution...

most stable rings contain five or six carbon atoms, but large rings (macrocycles) and smaller rings are common. The smallest cycloalkane family is the...

Michel (1999). "Gold(I) and Gold(0) Complexes of Phosphinine‐Based Macrocycles". Angewandte Chemie International Edition. 38 (21): 3194–3197. doi:10...

synthesis of the "Curtis macrocycles", in which a metal ion serves as a template for ring formation. Polyether macrocycles - or "crown" ligands - were...

Birdwell, Joseph F.; Bonnesen, Peter V.; Delmau, Laetitia H. (2005). Use of Macrocycles in Nuclear-Waste Cleanup: A Realworld Application of a Calixcrown in...

are bacteriochlorins, meaning their molecules have a bacteriochlorin macrocycle ring with two reduced pyrrole rings (B and D). Bacteriochlorophylls c...

carbohydrates) and large non-polymeric molecules such as lipids, nanogels and macrocycles. Synthetic fibers and experimental materials such as carbon nanotubes...

abbreviated as PPIX. Protoporphyrin IX contains a porphine core, a tetrapyrrole macrocycle with a marked aromatic character. Protoporphyrin IX is essentially planar...