Results 191 to 200 of about 430,530 (226)
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Journal of Organic Chemistry, 1999
New polypyridine-macrocyclic receptors for glucopyranosides were designed and synthesized. The artificial receptors possess a terpyridine skeleton as a hydrogen-bonding site and a flexible polyoxyethylene chain as a bridge for the macrocyclic structure, in which the cavity of the receptors is large enough to incorporate pyranosides.
Masahiko Inouye, Junya Chiba
exaly +3 more sources
New polypyridine-macrocyclic receptors for glucopyranosides were designed and synthesized. The artificial receptors possess a terpyridine skeleton as a hydrogen-bonding site and a flexible polyoxyethylene chain as a bridge for the macrocyclic structure, in which the cavity of the receptors is large enough to incorporate pyranosides.
Masahiko Inouye, Junya Chiba
exaly +3 more sources
Synthesis and characterization of the novel shape-persistent nanosized cavity macrocycle
Synthetic Metals, 2011Abstract The Friedel–Crafts reaction was employed to prepare the shape-persistent macrocycle (TPAP)3 with direct cyclization from three monomers of 2-(4′-(Phenyl(4″-methylphenyl)amino) phenyl)-propan-2-ol (TPAP), which contains two reactive groups of the t-hydroxyl and the p-proton on the triphenylamine. Under a very low monomer concentration (ca. 1%)
Qinggang Kong +8 more
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Soft Matter, 2021
Strong H-bonds suppress π–π stacking leading to an AIEE gel from a planar conjugated macrocycle.
Yang Ruan +3 more
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Strong H-bonds suppress π–π stacking leading to an AIEE gel from a planar conjugated macrocycle.
Yang Ruan +3 more
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Closing the cavity: reactive and light switchable dienone-ether macrocycles
CrystEngComm, 2010Dienone-ether macrocycles may be reversibly switched from the thermodynamically stable E,E,E,E-isomers, with an open central cavity, to globular, cavity-closed E,E,Z,Z-isomers by the action of sunlight. They are restored to their open forms by gentle heating, but more intense heating may result in an intramolecular reaction, closing the cavity in a ...
Luke T. Higham +2 more
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Synthesis and conformation of macrocyclic porphyrin dimers with potentially spacious cavities
Journal of the Chemical Society, Chemical Communications, 1988The importance of π–π donor–acceptor interactions is demonstrated in the synthesis and conformation of macrocyclic porphyrin dimers covalently linked by biphenyl or pyromellitimide bridges.
Christopher A. Hunter +2 more
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Self-Assembled Redox-Active Tetraruthenium Macrocycles with Large Intracyclic Cavities
Organometallics, 2020We report on five tetranuclear metallamacrocycles with particularly large inner voids of up to 19.4 × 18.9 A.
Daniel Fink +7 more
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A C84 selective porphyrin macrocycle with an adaptable cavity constructed through alkyne metathesis
Chemical Communications, 2012A bisporphyrin macrocycle was constructed from a porphyrin-based diyne monomer in one step through alkyne metathesis. The fullerene binding studies (C(60), C(70) and C(84)) showed the highest binding affinity of the macrocycle for C(84), which is in great contrast to its bisporphyrin four-armed cage analogue that showed the strongest binding with C(70).
Chenxi, Zhang, Hai, Long, Wei, Zhang
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The Journal of Organic Chemistry, 2010
Chiral macrocycles with the hydrogen bond donor/acceptor sites in the cavity were synthesized and covalently bonded to silica gel to give chiral stationary phases (CSPs), which showed excellent abilities to resolve various chiral compounds including ketones, esters, carboxylic acids, sulfoxides, amines, amino acid derivatives, and metal complexes.
Tadashi, Ema +5 more
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Chiral macrocycles with the hydrogen bond donor/acceptor sites in the cavity were synthesized and covalently bonded to silica gel to give chiral stationary phases (CSPs), which showed excellent abilities to resolve various chiral compounds including ketones, esters, carboxylic acids, sulfoxides, amines, amino acid derivatives, and metal complexes.
Tadashi, Ema +5 more
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Dalton Transactions, 2002
Reactions of potassium metal with trans-N,N′-dimethyl-meso-octaethylporphyrinogen or meso-octaethyldioxaporphyrinogen afford dipotassium complexes with one potassium cation excluded from the cavity on steric grounds in the former case, or both potassium cations bound inside the macrocyclic cavity in the latter case.
Jun Wang +4 more
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Reactions of potassium metal with trans-N,N′-dimethyl-meso-octaethylporphyrinogen or meso-octaethyldioxaporphyrinogen afford dipotassium complexes with one potassium cation excluded from the cavity on steric grounds in the former case, or both potassium cations bound inside the macrocyclic cavity in the latter case.
Jun Wang +4 more
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pH-Controlled metal translocation outside/inside the cavity of a polyamine macrocycle
Journal of Coordination Chemistry, 2008The synthesis of the macrocyclic ligand 4,4′-(2,6,10,13,18-pentaaza26)-2,2′-bipyridylcylophane (L), which contains a penta-amine chain linking the 4,4′ positions of a 2,2′-bipyridyl moiety, is reported. The heteroaromatic nitrogens of L are located outside the macrocyclic cavity.
BENCINI, ANDREA +5 more
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