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Catenane

Another synthetic strategy is based on self-assembly driven by molecular recognition between complementary TT-donors and 7T-acceptors. Examples include the synthesis of catenanes and rotaxanes that can act as controUable molecular shuttles (6,236). The TT-donors in the shuttles are located in the dumb-beU shaped component of the rotaxane and the 7T-acceptors in the macrocycHc component, or vice versa. The shuttles may be switched by chemical, electrochemical, or photochemical means. [Pg.209]

Catenanes are formed when two or more closed-circular DNAs are linked together to form a chain. Catenanes were first isolated in human mitochondrial DNA and have since been identified in a number of biological systems. These stmctures often occur as intermediates during the repHcation of circular DNA molecules. [Pg.254]

Both catenanes and knots can bring together remote DNA sequences and may be important in transcription regulation and genetic recombination... [Pg.254]

Catenanes and rotaxanes including macroheterocyclic fragments 99T5265. [Pg.206]

Template synthesis and chirality of catenanes, rotaxanes, and pretzelanes including N-macroheterocyclic lactams and related compounds as structure components 99PAC247. [Pg.268]

Intramolecular mobility of metal complexes of rotaxanes and catenanes with macroheterocyclic fragments 98ACR611. [Pg.269]

Nonionic template synthesis of amide-linked catenanes and rotaxanes with macroheterocyclic fragments 97AG(E)930. [Pg.270]

Self-assembly in construction of pseudorotaxanes, rotaxanes, and catenanes with crown ether fragments 98PAC419. [Pg.270]

Self-assembly of [2]catenanes containing metals in their backbones 99ACR53. [Pg.276]

As expected, the yields of catenanes by this approach are low, which is why improved methods for the preparation of such compounds have been developed. The acyloins are often only intermediate products in a multistep synthesis. For example they can be further transformed into olefins by application of the Corey-Winter fragmentation. [Pg.3]

Although the number of applications of olefin metathesis to transition metal complexes is small compared to the number of applications in organic synthesis, this field is becoming increasingly important. Spectacular examples are the double RCM reactions of copper phenanthroline complexes as a synthetic route to catenanes [113] or a recently reported approach to steric shielding of rhenium complex terminated sp-carbon chains [114]. [Pg.258]

When the reaction of two compounds results in a product that contains all the mass of the two compounds, the product is called an addition compound. There are several kinds. In the rest of this chapter, we will discuss addition compounds in which the molecules of the starting materials remain more or less intact and weak bonds hold two or more molecules together. We can divide them into four broad classes electron donor-acceptor complexes, complexes formed by crown ethers and similar compounds, inclusion compounds, and catenanes. [Pg.102]

These compounds contain two or more independent portions that are not bonded to each other by any valence forces but nevertheless must remain linked. Catenanes are made up of two or more rings held together as links in a chain, while in rotaxanes a... [Pg.113]

Singly and doubly interlocked [2]catenanes can exist as topological stereoisomers (see p. 144 for a discussion of diastereomers). Catenanes 35 and 36 are such stereoisomers and would be expected to have identical mass spectra. Analysis showed that 35 is more constrained and cannot readily accommodate an excess of energy during the mass spectrometry ionization process and, hence, breaks more easily. [Pg.114]

For a monograph, see Schill, G. Catenanes, Rotaxanes, and Knots Academic Press NY, 1971. For a review, see Schill, G. in Chiurdoglu Conformational Analysis Academic Press NY, 1971, p. 229. [Pg.123]

This molecule has no chiral carbons, nor does it have a rigid shape, but it too has neither a plane nor an alternating axis of symmetry. Compound 32 has been synthesized and has, in fact, been shown to be chiral. Rings containing 50 or more members should be able to exist as knots (33, and see 37 on p. 114 in Chapter 3). Such a knot would be nonsuperimposable on its mirror image. Calixarenes, ° crown ethers, catenanes, and rotaxanes (see p. 113) can also be chiral if suitably substituted. For example, A and B are nonsuperimposable mirror images. [Pg.136]

For a review of chirality in Mobius-strip molecules catenanes, and knots, see Walba, D.M. Tetrahedron, 1985, 41, 3161. [Pg.195]

The acyloin condensation was used in an ingenious manner to prepare the first reported catenane (see p. 113). ° This synthesis of a catenane produced only a small ield and relied on chance for threading the molecules before ring closure. [Pg.1563]

The template-directed preparation of cycloi is(paraquat-4,4 -biphenylene (a molecular square ) has been achieved the use of a macrocyclic hydroquinone-based polyether template incorporating an ester moiety in one polyether chain afforded a 1 1 mixture of two topologically stereoisomeric [3]catenanes <96CEJ877>. [Pg.337]

Schalley CA, WeUandt T, Briiggemann J,V6gtle F (2004) Hydrogen-Bond-Mediated Template Synthesis of Rotaxanes, Catenanes, and Knotanes. 248 141-200 Scheer M,see Balazs G (2003) 232 1-23... [Pg.266]


See other pages where Catenane is mentioned: [Pg.174]    [Pg.62]    [Pg.241]    [Pg.268]    [Pg.135]    [Pg.416]    [Pg.113]    [Pg.113]    [Pg.1602]    [Pg.1663]    [Pg.198]    [Pg.337]    [Pg.339]    [Pg.339]    [Pg.93]    [Pg.409]    [Pg.84]    [Pg.86]    [Pg.112]    [Pg.115]   
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Alternating polymer catenane

Amide catenanes

Amide-Based Catenanes, Rotaxanes and Pretzelanes

Amide-based poly catenanes

Amide-linked catenanes

Azide Chemistry in Rotaxane and Catenane Synthesis

Benzylic amide catenane

Biology 2]catenane

Bis catenanes

Bistable catenanes

Calix catenanes

Catalysts 2]catenane

Catalysts 2]catenanes

Catenan

Catenan

Catenands, catenane ligands

Catenane based device

Catenane cartoons

Catenane charged

Catenane circumrotation

Catenane components

Catenane correlation

Catenane cyclodextrin

Catenane definition

Catenane electroactive

Catenane electrochemical behavior

Catenane electron exchange

Catenane exchange processes

Catenane formation

Catenane high-yield synthesis

Catenane higher order

Catenane hybrid

Catenane intramolecular acyloin coupling reaction

Catenane isomerism

Catenane linking

Catenane metal-containing

Catenane molecular train

Catenane multi-ring

Catenane neutral

Catenane olympiadane

Catenane oxidative coupling

Catenane porphyrin-containing

Catenane pretzel-shaped

Catenane ring rotation

Catenane spacers

Catenane structures

Catenane switching processes

Catenane synthesis

Catenane template

Catenane template-directed synthesis

Catenane tetracationic cyclophane component

Catenane, structural chemistry

Catenane-like molecules

Catenanes

Catenanes

Catenanes - Molecular Daisy Chains

Catenanes 12-catenane

Catenanes 12-catenane

Catenanes Charge separation

Catenanes Mobius strip approach

Catenanes amide based synthesis

Catenanes amide-based

Catenanes and Rotaxanes Incorporating Amide Recognition Sites in Their Components

Catenanes anion-templated

Catenanes applications

Catenanes auxiliary linkage approaches

Catenanes bipyridinium based

Catenanes chemistry

Catenanes chiral

Catenanes circumrotation

Catenanes complex

Catenanes copper -templated synthesis

Catenanes cyclodextrin

Catenanes cyclodextrin-based

Catenanes cyclophane ligands

Catenanes cyclophane-polyether

Catenanes design

Catenanes diazapyrenium

Catenanes dimer-tetramer

Catenanes directed approaches

Catenanes directed synthesis

Catenanes doubly interlocked

Catenanes doubly-linked

Catenanes electrochemical properties

Catenanes electrochemically driven

Catenanes electrochemistry

Catenanes fluorescence

Catenanes gliding

Catenanes hetero

Catenanes hybrid

Catenanes hydrogen bonded

Catenanes isomerism

Catenanes isomers

Catenanes linear

Catenanes metal-directed self-assembly

Catenanes mixed

Catenanes molecular topology

Catenanes multi

Catenanes nomenclature

Catenanes oligo

Catenanes olympiadane

Catenanes periodic

Catenanes platinum

Catenanes polycatenanes

Catenanes polyhedral

Catenanes polymeric

Catenanes porphyrin-containing

Catenanes properties

Catenanes protein catenane

Catenanes proteins

Catenanes ring movements

Catenanes rotaxanes and

Catenanes ruthenium -containing

Catenanes single-stranded

Catenanes solid state structure

Catenanes spectroscopy

Catenanes statistical approach

Catenanes statistical methods

Catenanes stereochemistry

Catenanes structure

Catenanes synthesis

Catenanes template synthesis

Catenanes templated catenane synthesis

Catenanes templated syntheses

Catenanes three-state

Catenanes topological bond

Catenanes topological chirality

Catenanes topologically chiral sulfonamide

Catenanes transition metal-templated synthesis

Catenanes translational isomers

Catenanes unsymmetric

Catenanes with copper salt

Catenanes, and Knots

Catenanes, definition

Catenanes, entanglement

Catenanes, organic synthesis

Catenanes, porphyrin-incorporating

Catenans

Charge catenanes

Charged Catenanes

Chemistry with Amide-Based Catenanes and Rotaxanes

Chirality catenanes

Copolymer catenane

Copper-complexed catenane

Copper-complexed catenane electrochemically driven motions

Crossed -catenane

Crown ether-based poly 2]catenanes

Cyclic catenane

Cyclodextrin-containing catenane

Cyclododecene and derivatives catenanes

Dimeric DNA catenane

Donor-acceptor catenane

Double-Crossover Molecules as a Route to Linear Catenanes and Rotaxanes

Doubly intertwined catenane

Electrochemically Driven Ring Gliding Motion in Catenanes

Electron Transfer Processes in Rotaxanes and Catenanes

Entanglements, catenane-like

Experimental 2]catenane

Force Probe MD Simulations of Calixarene Catenanes

Functional catenanes

Higher-order Catenanes

Hydrocarbon catenanes, synthesis

Hydrogen Bonded Rotaxanes and Catenanes

Hydrogen-bonded amide template, catenane

Interlocked -catenane

Interlocked catenanes

Interlocked molecules catenanes

Interlocked molecules complex catenanes

Interlocked molecules templated catenane synthesis

Ligands catenane

Main-chain poly[2 catenanes

Mass spectrometry catenanes

Mechanical catenanes

Mechanically interlocked molecules catenanes

Metal catenanes

Metal-Assembled Catenanes, Rotaxanes, and Knots

Metal-Templated Synthesis of Catenanes

Metal-backbone catenanes

Metallo catenanes

Mobility, rotaxanes/catenanes

Molecular Catenanes and Knots

Molecular catenanes

Motional modes 2]catenanes

Multiple catenanes

Neutral Catenanes

Novel Supramolecular Architectures—Catenanes, Rotaxanes, and Knots

Organic Template-Directed Syntheses of Catenanes, Rotaxanes, and Knots

Other Catenanes and Knots

Other Catenanes and Rotaxanes

Photoswitchable catenane

Poly catenane

Poly catenanes

Polycatenanes polymeric catenanes

Polymer catenane

Protein catenane

Protein catenane synthesis

Quantitative Formation of Catenanes from Rectangular Molecular Boxes

Redox active catenane

Redox switchable catenane

Rotaxane and Catenane Structures Involving Cyclodextrins

Rotaxanes, catenanes and knots

Self-assembly of catenanes

Shape catenanes

Single Molecular Images of DNA Catenanes Observed by AFM

Statistical Approaches to Catenanes and Rotaxanes

Supramolecular catenanes

Synthesis of a -Catenane

Template Effects for the Syntheses of Rotaxanes, Catenanes, and Knots

Template reactions/synthesis catenanes

Templated catenane synthesis

Thermodynamically self-assembled catenanes

Topological isomers catenanes

Topology catenanes

Transition Metal-Incorporating Catenanes

Transition metal-complexed catenane

Transition metal-complexed catenane machines

Transition metal-complexed catenane rotaxane

Transition metal-templated formation of -catenanes and -rotaxanes

Transition metal-templated synthesis of catenanes

Translational isomerism, catenanes

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