Results 1 to 10 of about 973 (110)

Syntheses and structural studies of calix[4]arene-nucleoside and calix[4]arene-oligonucleotide hybrids [PDF]

Nucleic Acids Symposium Series, 2003
We have synthesized three types of calix[4]arene-nucleoside hybrids efficiently by amide bond formation between the amine functional groups of 1,3-diamino-calix[4]arene and the carboxyl groups of thymidine nucleoside derivatives. X-Ray crystallography of a homocoupled calix[4]arene-nucleoside hybrid revealed an interesting hydrogen bonding pattern ...
Su Jeong, Kim, Eun-Kyoung, Bang, Byeang Hyean, Kim   +2 more
openaire   +6 more sources

Calix[4]arene-fused phospholes [PDF]

Dalton Transactions, 2017
A calix[4]arene-based biarylphosphine has been synthesised and catalytically converted into two diastereomeric, calixarene-fused phospholes.
Elaieb, Fethi, Sémeril, David, Matt, Dominique, Pfeffer, Michel, Bouit, Pierre-Antoine, Hissler, Muriel, Gourlaouen, Christophe, Harrowfield, Jack   +7 more
openaire   +3 more sources

An Efficient Synthesis of Bis(calix[4]arenes), Bis(crown ether)-Substituted Calix[4]arenes, Aza-Crown Calix[4]arenes, and Thiaza-Crown Calix[4]arenes

European Journal of Organic Chemistry, 2000
The easy transformation of 5,11,17,23-tetra-tert-butyl-25,27-bis(aminoethoxy)-26,28-dihydroxycalix[4]arene (2) into 5,11,17,23-tetra-tert-butyl-26,28-dihydroxy-25,27-bis(2-isothiocyanoethoxy)calix[4]arene (3) and 5,11,17,23-tetra-tertbutyl-25,27-bis(chloroacetamidoethoxy)-26,28-dihydroxycalix[4]arene (4) has been exploited for the development of an ...
Santoyo-González, Francisco, Torres-Pinedo, Antonio, Barria, Claudio Saitz   +2 more
openaire   +2 more sources

The Pinched Cone Conformation of Calix[4]arenes:  Noncovalent Rigidification of the Calix[4]arene Skeleton [PDF]

The Journal of Organic Chemistry, 1996
Calix[4]arenes at the upper rim substituted with two (thio)urea moieties, 2a−c and 4, or substituted with two acetamido groups, 5, adopt a pinched cone conformation in CDCl3 solution.
Scheerder, Jurgen, Vreekamp, Remko H., Engbersen, Johan F.J., Verboom, Willem, van Duynhoven, John P.M., Reinhoudt, David N.   +5 more
openaire   +1 more source

Chiral Calix[4]arenes.

Journal of Synthetic Organic Chemistry, Japan, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Okada, Yukihiro, Miao, Zhihui, Nishimura, Jun   +2 more
openaire   +2 more sources

The synthesis of metallocene calix[4]arenes

Journal of Inclusion Phenomena, 1987
The condensation of 1,1′-bis(chlorocarbonyl)metallocenes andp-tert-butylcalix[4]arene in toluene leads to novel metallocene calix[4]arenes in which the metallocene subunit bridges the opposite hydroxy groups of the parent calixarene.
Beer, P, Keefe, A
openaire   +2 more sources

Virus‐Mediated Self‐Assembly of Functional Cyclodextrins for Antiviral Inhibition

Angewandte Chemie, Volume 138, Issue 38, 14 September 2026.
A sialic acid (SA)‐functionalized cyclodextrin (CD) self‐assembles on SARS‐CoV‐2 through ligand–receptor recognition, nucleating cooperative supramolecular polymer growth that blocks infection. The adaptive assembly requires both ligand binding and host–guest polymerization, remains active across variants, and can be tuned by coassembly, establishing ...
Pedro J. Hernando, Laora Boulo, Léonid Lavnevich, Elisa Teyssou, Stéphane Marot, Adélie Gothland, Jean‐Michel Guigner, Anne‐Geneviève Marcelin, Mickaël Ménand, Vincent Calvez, Matthieu Sollogoub   +10 more
wiley   +2 more sources

A Crystalline and Thermally Stable Selenocysteine Selenenic Acid

Angewandte Chemie, Volume 138, Issue 32, 3 August 2026.
The long‐sought catalytic intermediate of selenoproteins, selenocysteine selenenic acid (Sec–SeOH), is isolated for the first time at ambient temperature. A bioinspired selenopeptide sequence encapsulated within a protective molecular cradle and an oxidant‐free route from selenenyl iodide (Sec–SeI) enable the isolation of Sec–SeOH. Contrary to the long‐
Ryosuke Masuda, Satoru Kuwano, Kei Goto
wiley   +2 more sources

Benzo[c][1,2,5]Thiadiazole Linkers Enhance the Effectiveness of Cavity‐Containing Supramolecular Photocatalysts

Chemistry – A European Journal, EarlyView.
Seven novel supramolecular photosensitizers based on benzo[c][1,2,5]thiadiazole (BTZ) tethered to calix[4]arene (C[4]) scaffolds are reported with facile, scalable, and selective syntheses. Their abilities to produce singlet oxygen have been tested through the photo‐oxidation of α‐terpinene.
Leonardo Amicosante, Dominic Taylor, Cameron L. Campbell, Daniel M. Lambden, Georgina M. Rosair, Filipe Vilela, Scott J. Dalgarno   +6 more
wiley   +1 more source

syn-1,2-dialkylated calix[4]arenes : general intermediates in the NaH/DMF tetraalkylation of calix[4]arenes [PDF]

Tetrahedron Letters, 1991
In DMF or acetonitrile with NaH as a base at room temperature the tetraalkylation of calix[4]arenes 1a and 1b proceeds via the syn-1,2-disubstituted products to the tetraalkylated calix[4]arenes in the cone conformation. With KH as a base the tetraalkylated calix[4]arenes are predominantly formed in the partial cone conformation, and the reaction ...
Groenen, L.C., Groenen, Leo C., Ruel, Bianca H.M., Casnati, Alessandro, Timmerman, P., Verboom, Willem, Harkema, Sybolt, Pochini, Andrea, Ungaro, Rocco, Reinhoudt, David   +9 more
openaire   +4 more sources