Zobrazeno 1 - 10
of 211
pro vyhledávání: '"Koichiro Naemura"'
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 114:157-162
The circular dichroism (CD) and UV spectra of chiral bridged aromatic compounds, 7,8,15,16−tetrahydro-7,15-methanocycloocta[1,2-a:5,6-a′]dinaphthalene-8,16 -diol [(-)-1] and −8,16- dione [(-)-2], have been theoretically calculated by applicatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9a2bc21767fc4b966685be79fcfdaf8a
https://doi.org/10.1002/recl.19951140406
https://doi.org/10.1002/recl.19951140406
Autor:
Shunji Araki, Yoshito Tobe, Keiji Hirose, Naoto Utsumi, Kiyomi Adachi, Koichiro Naemura, Atsushi Nagano, Kazuya Kawabata, Motohiro Sonoda
Publikováno v:
Journal of the American Chemical Society. 124:5350-5364
m-Diethynylbenzene macrocycles (DBMs), buta-1,3-diyne-bridged [4(n)]metacyclophanes, have been synthesized and their self-association behaviors in solution were investigated. Cyclic tetramers, hexamers, and octamers of DBMs having exo-annular octyl,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e06bc8c6409d73ac196bffc49c4ce74c
https://doi.org/10.1021/ja012458m
https://doi.org/10.1021/ja012458m
Publikováno v:
Tetrahedron. 57:8075-8083
Butadiyne-bridged [4 4 ]- and [4 8 ]metacyclophanes having exo -annular t -butyl groups were prepared by intermolecular Eglinton coupling of the dimeric unit or by intramolecular ring closure of the linear tetramer. Comparison of the 1 H and 13 C NMR
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::937b56f1aac0ba9a3e7ed63f3ab5efdf
https://doi.org/10.1016/s0040-4020(01)00779-7
https://doi.org/10.1016/s0040-4020(01)00779-7
Autor:
Jun-ya Kishi, Yoshito Tobe, Koichiro Naemura, Motohiro Sonoda, Tomonari Wakabayashi, Nobuko Nakagawa, Yohji Achiba, Tadamasa Shida
Publikováno v:
Tetrahedron. 57:3629-3636
[16.16.16](1,3,5)Cyclophanes fused by six [4.3.2]propellatriene units, which would serve as precursors to cage polyyne C60H6 and its perchloro derivative C60Cl6, respectively, were prepared. In the negative mode laser desorption mass spectra of the c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74a5843ccc79149a0347c6ea355d6e2c
https://doi.org/10.1016/s0040-4020(01)00250-2
https://doi.org/10.1016/s0040-4020(01)00250-2
Publikováno v:
Organic Letters. 2:3265-3268
Butadiyne-bridged [4(4)](2,6)pyridinophane and [4(6)](2, 6)pyridinophane derivatives were synthesized, and their heteroassociations with the corresponding metacyclophanes and complexations with organic cations were investigated.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be87d6f61c9fd69fc8e5b9daa44d4483
https://doi.org/10.1021/ol006318d
https://doi.org/10.1021/ol006318d
Publikováno v:
Tetrahedron: Asymmetry. 11:1199-1210
The enantioselectivity of the kinetic resolution of a primary alcohol which has a chiral center at the β-position of the hydroxyl group was substantially improved by employing a racemic mixture of a chiral acyl donor for enantioselective transesteri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d969ed835ad6e1c883ac377585f01566
https://doi.org/10.1016/s0957-4166(00)00060-4
https://doi.org/10.1016/s0957-4166(00)00060-4
Autor:
Kunihiro Tsumuraya, Motohiro Sonoda, Daisuke Noguchi, Yoshito Tobe, and Yohji Achiba, Toshihiko Fujii, Tomonari Wakabayashi, Nobuko Nakagawa, Koichiro Naemura, Hideki Matsumoto
Publikováno v:
Journal of the American Chemical Society. 122:1762-1775
As a method to generate all-carbon molecules having highly reactive polyyne units from stable precursors, the [2 + 2] cycloreversion of [4.3.2]propella-1,3,11-triene derivatives was developed. To test the efficiency of this method, the reaction was f
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3d44cf1008332d55d8d54a6174bc616
https://doi.org/10.1021/ja993314z
https://doi.org/10.1021/ja993314z
Publikováno v:
Scopus-Elsevier
Optically active azophenolic crown ethers having phenyl groups substituted at the respective para-position were prepared and their association constants with chiral aminoethanol derivatives, including 2-amino-2-phenylethanols having an electron-donat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33337ca67703d79cd20af2144c395482
https://doi.org/10.1039/a910171n
https://doi.org/10.1039/a910171n
Autor:
Kazuko Ogasahara, Yasushi Nishikawa, Kazuyuki Nishioka, Yoshito Tobe, Keiji Hirose, Koichiro Naemura
Publikováno v:
Tetrahedron: Asymmetry. 9:563-574
Homochiral crown ether ( S , S )- 1 containing 1-naphthyl groups as chiral barriers together with the phenol moiety was prepared by using ( S )- 3 as a chiral subunit which was resolved in enantiomerically pure form by lipase-catalyzed enantioselecti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c32852e3ce79a909dcf43a45ec4cd088
https://doi.org/10.1016/s0957-4166(97)00638-1
https://doi.org/10.1016/s0957-4166(97)00638-1
Autor:
Jun Nishida, Koichiro Naemura, Masami Sawada, Masanori Okamoto, Keiji Hirose, Hitoshi Yamada, Yoshio Takai, Takahiro Kaneda, Toshikazu Tanaka, Ryuichi Arakawa
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 2. :701-710
Chiral recognition of crown ethers toward amino acids and their esters is detected both by electrospray ionization (ESI) and by fast atom bombardment (FAB) mass spectrometry (MS) and then compared as a series of host (H)–guest (G) pairs. A racemic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d76100feb277c0916ffd6118023a1b38
https://doi.org/10.1039/a705792j
https://doi.org/10.1039/a705792j