- Reversible Multistimuli Switching of a Spiropyran-Functionalized Organic Cage in Solid and Solution
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A spiropyran-decorated covalent organic cage (PC2) has been designed, employing dynamic imine chemistry followed by imine bond reduction. The molecule is capable of altering its color upon exposure to external stimuli such as heat and light. Construction of a 3D organic cage introduces a new piece to the system by swapping the closed form with the open form in the solid state with diverse color change. Moreover, this material has high chemical stability and is capable of reversible stimuli-responsive color change without any degradation for an extended period.
- Mondal, Bijnaneswar,Ghosh, Aloke Kumar,Mukherjee, Partha Sarathi
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- Imine organic cages derived from tetraphenylethylene dialdehydes exhibiting aggregation-induced emission and explosives detection
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Sensitive detection of explosives has always been a frontier research for scientists. In this work, two [3 + 2] imine organic cages (1 and 2) stemmed from distinct TPE-based dialdehydes (TPE-2CHO/TPE-2PCHO) and common tri(2-aminoethyl)amine were obtained. Both of them are fluorescence silence in solution and high-efficient AIE could be observed, which is different from all known TPE-based organic cages with AIEE properties. Because of the cage skeleton encircled by multiple benzene rings, the two cages can effectively detect various explosives including nitrobenzene, 2-nitrotoluene, 3-nitrotoluene, 4-nitrotoluene and 2,6-dinitrotoluene both in solution and in the solid state, in which cage 1 displays higher detection ability due to its nine encircling benzene donors
- Feng, Fanda,Huang, Wei,Peng, Yuxin,Zhang, Lei
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- AMINOGUANIDINE HYDRAZONES AS RETROMER STABILIZERS USEFUL FOR TREATING NEUROLOGICAL DISEASES
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The present invention relates to novel aminoguanidine hydrazone-derivatives of Formula (I) which are effective as retromer stabilizers and useful as neuroprotecting drugs. The invention also relates to pharmaceutical compositions comprising the compounds and their use in therapy and diagnostic.
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Page/Page column 21; 46; 50-51
(2020/10/20)
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- AROMATIC RING-CONTAINING COMPOUND AND CANCER PREVENTIVE AND/OR THERAPEUTIC AGENT
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PROBLEM TO BE SOLVED: To provide cancer preventive/therapeutic means that can exhibit cancer cell-specific therapeutic effect on many cancers. SOLUTION: According to one embodiment of the present invention, an aromatic ring-containing compound represented
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- Hexagon wreaths: Self-assembly of discrete supramolecular fractal architectures using multitopic terpyridine ligands
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In this study, we overcame a challenge in conventional self-assembly of macrocycles that uses ditopic 2,2:6,2-terpyridine (tpy) building blocks with a 120angle between two ligating moieties, which generally produces a mixture of multiple macrocycles instead of a single hexagon. Two supramolecular hexagon wreaths, [Zn9LA6] and [Zn12LB6], were designed and self-assembled from tritopic and tetratopic tpy ligands with Zn(II) ions, respectively. These multitopic ligands, bearing multiple binding sites, increased the total density of coordination sites and provided high geometric constraints to induce the formation of discrete structures. Such hexagon wreaths, which were constructed by simple recursion of small hexagons around a central hexagon, exhibit fractal geometry features with self-similarity at different levels. The shapes, sizes, and structures were fully characterized by NMR, ESI-MS, traveling-wave ion mobility mass spectrometry (TWIM-MS), and transmission electron microscopy. With diameters around 5.5 nm for [Zn 9LA6] and 5.8 nm for [Zn12LB6], the remarkable rigidity of these fractal architectures was supported by TWIM-MS, in contrast to the high flexibility of macrocycles assembled by ditopic tpy ligands.
- Wang, Ming,Li, Xiaopeng,Wang, Chao,Hao, Xin-Qi,Liu, Jingjing,Li, Xiaohong,Xu, Chenglong,Lopez, Alberto,Sun, Luyi,Song, Mao-Ping,Yang, Hai-Bo
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p. 6664 - 6671
(2014/05/20)
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- Syntheses, structures, and electronic and optical properties of platinum(II) complexes of 1,3-bis(imino)benzene-derived pincer ligands
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Six new PtII complexes of 5-substituted 1,3-bis(N-methylimino) benzene (bIBH)-derived ligands have been synthesized by direct reactions with K2PtIICl4 in glacial acetic acid. The ethenylene groups in the two sty
- Blackburn, Octavia A.,Coe, Benjamin J.,Helliwell, Madeleine,Raftery, James
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p. 5307 - 5320
(2012/11/07)
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- Construction of hexanuclear macrocycles by a coupling strategy from polyfunctionalized bis(terpyridines)
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The construction of a heteronuclear (Ru4Fe2) hexameric metallomacrocycle with methyl- and carbonyl-functionalized bis(terpyridyl) moieties was achieved by a self-assembly of a dinuclear trimer, which was prepared in high yield via Pd
- Eryazici, Ibrahim,Newkome, George R.
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scheme or table
p. 345 - 357
(2009/06/21)
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- Synthesis of nitronyl- and imino-nitroxide-triradicals interconnected by phenyl ethynyl spacer
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The design and synthesis, as well as solid state and ESR characterisation of three new triradicals based on phenyl ethynyl backbone bearing nitronyl-nitroxide and imino-nitroxide groups, are reported. The synthesis of these compounds was based on palladium-coupling reactions between alkynyl and bromo derivatives. An ESR study showed magnetic interactions between the radicals through the phenyl ethynyl-coupling unit in solution. (C) 2000 Elsevier Science Ltd.
- Catala, Laure,Turek, Philippe,Le Moigne, Jacques,De Cian, André,Kyritsakas, Nathalie
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p. 1015 - 1018
(2007/10/03)
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- Enantioselective catalysis; 123: Octaaldehyde type chelating ligands - A divergent synthesis approach to easily tunable expanded ligands for enantioselective catalysis
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A broad range of optically active two-layer phosphanes was obtained by a divergent reaction sequence. Chirality was introduced into the ligands in the last step by easily performed Schiff base condensation of primary amines from the 'chiral pool' and achiral octaaldehydes containing a bisphosphane core. The two achiral precursors are 1,2-ethylene- and o-phenylene-bridged bisphosphanes with four 3,5-dicarbaldehyde-substituted phenyls, synthesized in six steps. The resulting octaimine ligands have been used in Rh, Pd and Ni complexes in several model reactions of enantioselective catalysis giving low optical inductions.
- Brunner,Janura,Stefaniak
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p. 1742 - 1749
(2007/10/03)
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- Design and synthesis of a "starburst"-type nonadiazo compound and magnetic characterization of its photoproduct
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A "starburst"-type nonadiazo compound was designed and synthesized by using the cyclotrimerization of 3,5-dibenzylphenyl ethynyl ketone as a key step.The diazo compound was photolyzed in methyltetrahydrofuran solid solution at cryogenic temperatures and a
- Matsuda, Kenji,Nakamura, Nobuo,Inoue, Katsuya,Koga, Noboru,Iwamura, Hiizu
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p. 259 - 264
(2007/10/03)
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- Preparation of Benzene-1,3-dicarbaldehydes
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Benzene-1,3-dicarbaldehydes are conveniently prepared via the photothermal side-chain bromination of 1,3-dimethyl-arenes and the subsequent hydrolysis of 1,3-bis(dibromomethyl)arenes.
- Mataka, Shuntaro,Liu, Guo-Bin,Sawada, Tsuyoshi,Tori-i, Akiyoshi,Tashiro, Masashi
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p. 410 - 411
(2007/10/03)
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- Design, synthesis, and characterization of three kinds of π-cross-conjugated hexacarbenes with high-spin (S = 6) ground states
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Three kinds of nonlinearly π-conjugated hexadiazo compounds were obtained from the corresponding hexaketones for which cyclotrimerizaton of the ethynyl ketones to form 1,3,5-triaroylbenzenes and deoxygenation of a calix[6]arene were key steps. The diazo c
- Matsuda, Kenji,Nakamura, Nobuo,Takahashi, Kazuyuki,Inoue, Katsuya,Koga, Noboru,Iwamura, Hiizu
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p. 5550 - 5560
(2007/10/02)
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- PHOTOCHEMICAL PRODUCTION OF HIGHLY ORDERED SPINS IN ORGANIC SOLIDS
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Poly(m-phenylenemethynyl)s and the related ?-conjugated polymers to which photolabile diazo groups are attached as pendants have been prepared.They were photolyzed and studied in situ by means of ESR spectroscopy and magnetometry on a Faraday magnetic bal
- Matsuda, Kenji,Inoue, Katsuya,Koga, Noboru,Nakamura, Nobuo,Iwamura, Hiizu
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- Circular Dichroism, XCI. - Syntheses and CD of Benzene Derivatives with Several Similar Substituents
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Several optically active 1,2-di and 1,3,5-trisubstituted benzene derivatives have been synthesized, in which one substituent is chiral, the others being methyl, ethyl, or neopentyl.The CD spectra within the α-band can be explained well by making use of Pl
- Netzke, Karl,Snatzke, Guenther
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p. 1365 - 1372
(2007/10/02)
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