Results 101 to 110 of about 8,043 (225)

Folding of a donor–acceptor polyrotaxane by using noncovalent bonding interactions [PDF]

, 2008
Mechanically interlocked compounds, such as bistable catenanes and bistable rotaxanes, have been used to bring about actuation in nanoelectromechanical systems (NEMS) and molecular electronic devices (MEDs).
A. Z. Stieg, Appella, Beebe, Berna, Binnig, Chatterjee, Collier, Collier, D. Benitez, Estroff, Fletcher, Frechet, Harth, Hawker, J. F. Stoddart, J. K. Gimzewski, J. R. Heath, Kim, Liu, Liu, Miljanic, Sheiko, Srinivasachari, Torn  e, W. R. Dichtel, W. Zhang, Wenz   +26 more
core   +3 more sources

Excimer Formation in Aqueous Solutions of Hosts and Application in Synthesis

ChemPhotoChem, Volume 10, Issue 4, April 2026.
This review explores how host‐mediated excimer formation in water, facilitated by supramolecular confinement enhances photochemical synthesis. By improving solubility, local concentrations, and orientational control, these systems can boost efficiency and selectivity in reactions like photocycloadditions and photodimerizations.
Doğan Akbulut, Florian Friedmann, Gianna Pölderl, Line Næsborg   +3 more
wiley   +1 more source

An Overlooked Pathway in 1,3-Dipolar Cycloadditions of Diazoalkanes with Enamines. [PDF]

Angew Chem Int Ed Engl, 2022
Li L, Mayer P, Stephenson DS, Ofial AR, Mayer RJ, Mayr H.   +5 more
europepmc   +1 more source

Amphiphilic Polymer Model Networks Synthesized by Different Hetero‐Complementary Coupling Reactions of Tetra‐PEG and Tetra‐PCL Stars

Macromolecular Chemistry and Physics, Volume 227, Issue 7, 14 April 2026.
Amphiphilic co‐networks (ACN) synthesized by different hetero‐complementary reactions of hydrophilic tetra‐PEG and hydrophobic tetra‐PCL stars are compared. For the ACNs, equilibrium volume swelling degrees (Qv) are determined. Information about the ACNs micro structure (connectivity distribution) is obtained from proton low‐resolution multiple‐quantum
Stephanie Ihmann, Bidit Lamsal, Martin Geisler, Kay Saalwächter, Frank Böhme   +4 more
wiley   +1 more source

Formation of Pyrazol-1,3,4-Thiadiazoles through 1,3-Dipolar Cycloadditions of 3-Thioxo-[1,2,4]-Triazepin-5-one with Nitrilimines: An Experimental and Computational study [PDF]

, 2009
In this work the results of experimental and computational study of the title compounds and some ancillary compounds are reported. Two bicyclic pyrazol-1,3,4-thiadiazole derivatives were synthesized by reaction between 6-dimethylaminomethylene-3-thioxo-
Azzouzi, S., Domingo, Luis R., El Messaoudi, M., Esseffar, M., Jalal, R., Latorre, J., Liu González, M., Sáez Cases, José Antonio   +7 more
core   +2 more sources

Electrocyclic Ring‐Opening of 1,2,4‐Oxadiazole[4,5‐a]piridinium Chloride: a New Route to 1,2,4‐Oxadiazole Dienamino Compounds

ChemistryOpen, 2019
1,2,4‐Oxadiazole[4,5‐a]piridinium chloride adds nucleophiles to undergo electrocyclic ring opening affording 1,2,4‐oxadiazole dienamino derivatives. These pyridinium salts represent a special class of Zincke salts that are prone to rearrange when treated
Dr. Stefano Carella, Dr. Misal Giuseppe Memeo, Prof. Paolo Quadrelli   +2 more
doaj   +1 more source

ZnFe2O4@SiO2@AC Magnetic Nanocomposite as an Efficient Catalyst for Ultrasound‐Assisted Azidation of Aryl Halides to Aryl Amines

ChemistryOpen, Volume 15, Issue 4, April 2026.
nanocomposite catalyst was synthesized, demonstrating a reliable approach that underscores its innovative potential in the azidation of aryl halides, followed by their conversion to aryl amines. In this study, a novel ZnFe2O4@SiO2@AC nanocomposite catalyst was synthesized, demonstrating a reliable approach that underscores its innovative potential in ...
Manish Kumar, Rima Heider Al Omari, Soumya V. Menon, Shaker Al‐Hasnaawei, Ahmad Sajjadi, Amrita Pal, Renu Sharma, Aashna Sinha   +7 more
wiley   +1 more source

Nucleophilic substitution of a phthalimidyl group with morpholine in an N1‐methyl‐1,2,3‐triazole: crystallographic evidence for migration of the methylene bridge

Acta Crystallographica Section C, Volume 82, Issue 4, Page 144-150, April 2026.
X‐ray crystallography revealed that the reaction of 2‐{[4‐(4‐bromophenyl)‐1H‐1,2,3‐triazol‐1‐yl]methyl}phthalimide with morpholine led to substitution of the phthalimide group, including migration of the substituent from N1 to N2 on the 1,2,3‐triazole ring.2‐{[4‐(4‐Bromophenyl)‐1H‐1,2,3‐triazol‐1‐yl]methyl}phthalimide, C17H11BrN4O, was synthesized by ...
Paul R. Palme, Richard Goddard, Markus Leutzsch, Adrian Richter, Peter Imming, Rüdiger W. Seidel   +5 more
wiley   +1 more source

A Novel Cycloaddition Reaction of Thermally Generated Sulfenes

CHIMIA, 1992
The highly strained ?-sultine 4, resulting from the addition of SO2 to benzobenzvalene, is shown to undergo a thermal cycloreversion which gives 1H-indene-1-thiocarbaldehyde dioxide (6) as an intermediate and subsequently 1H-indene-1 ...
Ulrich Burger, Serge P. Schmidlin, Jiri Mareda, Gerald Bernardinelli   +3 more
doaj   +2 more sources

SuFExable NH-Pyrazoles via 1,3-Dipolar Cycloadditions of Diazo Compounds with Bromoethenylsulfonyl Fluoride. [PDF]

J Org Chem, 2022
Yamanushkin P, Kaya K, Feliciano MAM, Gold B.   +3 more
europepmc   +1 more source