Výsledky vyhledávání - "Fumitaka Narumi"

Oxidation of cyclohexene with molecular oxygen catalyzed by cobalt porphyrin complexes immobilized on montmorillonite

Autor: Hideyuki Kameyama, Hiroshi Kameyama, Fumitaka Narumi, Tetsutaro Hattori

Publikováno v: Journal of Molecular Catalysis A: Chemical. 258:172-177

Composite materials were prepared by intercalating cationic porphyrinato cobalt complexes with the substituents of the quaternary ammonium salt of heterocyclic amine into a montmorillonite interlayer. Using these clay interlayer-fixed porphyrinato co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::83bd13b028c70d2842f329eeadef9244
https://doi.org/10.1016/j.molcata.2006.05.022

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Resolution of inherently chiral anti-O,O′-dialkylated calix[4]arenes and determination of their absolute stereochemistries by CD and X-ray methods

Autor: Fumitaka Narumi, Tetsutaro Hattori, Waka Yamabuki, Hiroshi Kameyama, Chizuko Kabuto

Publikováno v: Tetrahedron: Asymmetry. 16:793-800

Inherently chiral anti-O,O′-dibenzyl-p-tert-butylcalix[4]arene 1 was resolved as the (S)-2-methoxy-2-(naphthalen-1-yl)propionic ester by flash chromatography. Conversely, the anti-O,O′-dibutyl analogue 2 was resolved as the (Sa)-2′-methoxy-1,1�

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6103d57bfed5d81bdf877b06e6c217b1
https://doi.org/10.1016/j.tetasy.2004.11.095

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Synthesis of an inherently chiral O,O′-bridged thiacalix[4]crowncarboxylic acid and its application to a chiral solvating agent

Autor: Toru Onodera, Tetsutaro Hattori, Hiroshi Kameyama, Fumitaka Narumi, Nobuji Matsumura, Chizuko Kabuto, Hiroshi Katagiri, Sotaro Miyano

Publikováno v: Tetrahedron. 60:7827-7833

Treatment of readily available O,O′-1,1,3,3-tetraisopropyldisiloxane-1,3-diyl-bridged p-tert-butylthiacalix[4]arene ( 1 ) with tri(ethylene glycol) di-p-tosylate and subsequent desilylation gave O,O′-bridged thiacalix[4]crown 3 in an excellent yi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1865e5cee4b0f07e9cb68416e976c88f
https://doi.org/10.1016/j.tet.2004.06.074

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Formation of Well-Definedp-tert-Butylcalix[4]arenedithiolate Monolayers on a Au(100)−(1 × 1) Surface Studied by In Situ Scanning Tunneling Microscopy

Autor: Masuhiro Abe, Fumitaka Narumi, Kingo Itaya, Katsuhiko Nishiyama, Kenji Sashikata, Soichiro Yoshimoto, Isao Taniguchi

Publikováno v: Langmuir. 19:8130-8133

p-tert-Butylcalix[4]arene-1,3-dithiol (BCAD) was synthesized to prepare a functionalized surface for host-guest molecular recognition by immobilizing it on the Au(100)-(1 × 1) surface in 0.05 M HClO 4 . In situ scanning tunneling microscopy (STM) wa

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::3ceffcdda9209567c1fbaa45f9b7becd
https://doi.org/10.1021/la034819c

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Proximal O,O′-capped calix[4]arenes with a disiloxane bridge as highly efficient synthetic intermediates for 1,2-dialkylation at the lower rim

Autor: Fumitaka Narumi, Naoya Morohashi, Nobuji Matsumura, Hiroshi Kameyama, Nobuhiko Iki, Sotaro Miyano

Publikováno v: Tetrahedron Letters. 43:621-625

Treatment of calix[4]arenes with 1,3-dichloro-1,1,3,3-tetraisopropyldisiloxane using imidazole as a base yielded O , O ′-bridged calixarenes in excellent yields, which were subsequently treated with an alkyl halide/base to give O ″, O ‴-dialkyl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2976f705a8018a87966dec002d65d8f1
https://doi.org/10.1016/s0040-4039(01)02202-x

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Novel molecular receptors based on a thiacalix[4]arene platform. Preparations of the di- and tetracarboxylic acid derivatives and their binding properties towards transition metal ions

Autor: Nobuhiko Iki, Toyohisa Fujimoto, Tomohiro Suzuki, Naoya Morohashi, Sotaro Miyano, Fumitaka Narumi

Publikováno v: Tetrahedron Letters. 40:7337-7341

Novel molecular receptors, cone- and 1,3-alternate-tetracarboxylic acid (3) and syn-A,C-dicarboxylic acid (5), were prepared by hydrolysis of the ester moiety of the tetra- (2) and di-ethers (4), which had been synthesized by regio- and conformation-

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c6e040d9371de3c312c3c456eecac8d3
https://doi.org/10.1016/s0040-4039(99)01503-8

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Selective synthesis of three conformational isomers of tetrakis[(ethoxycarbonyl)methoxy]thiacalix[4]arene and their complexation properties towards alkali metal ions †

Autor: Nobuhiko Iki, Toyohisa Fujimoto, Naoya Morohashi, Sotaro Miyano, Fumitaka Narumi

Publikováno v: Journal of the Chemical Society, Perkin Transactions 2. :2745-2750

5,11,17,23-Tetra-tert-butyl-2,8,14,20-tetrathiacalix[4]arene-25,26,27,28-tetrol (TCA) underwent facile tetra-O-alkylation by treatment with ethyl bromoacetate in the presence of an alkali carbonate as base catalyst in DMF or acetone to provide a mixt

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ba1553fc95b84b99ab7e7a4a6620b585
https://doi.org/10.1039/a803734e

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High Complexation Ability of Thiacalixarene with Transition Metal Ions. The Effects of Replacing Methylene Bridges of Tetra(p-t-butyl)calix[4]arenetetrol by Epithio Groups

Autor: Naoya Morohashi, Nobuhiko Iki, Fumitaka Narumi, Sotaro Miyano

Publikováno v: Bulletin of the Chemical Society of Japan. 71(7):1597-1603

The ability of tetra(p-t-butyl)tetrathiacalix[4]arenetetrol (TCA, H4L), a cyclic tetramer of p-(t-butyl)phenol bridged with four epithio groups, to bind metal ions was investigated via a solvent extraction study. Although tetra(p-t-butyl)calix[4]aren

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::91b6bd6ff1fd74d6fbfbf4d01026ea39
http://hdl.handle.net/10097/51693

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