Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Chiyomi Murata"'
Autor:
Toshinobu Masuda, Chiyomi Murata, Hitoshi Nohta, Hideyuki Yoshida, Masatoshi Yamaguchi, Akira Takadate, Yasuko Kamochi, Kenichiro Todoroki
Publikováno v:
CHEMICAL & PHARMACEUTICAL BULLETIN. 53:750-758
To improve the fluorescence characteristics, especially emission wavelength, of coumarins, various 3-substituted-6-methoxycoumarin derivatives were synthesized, and then benzocoumarin derivatives were also synthesized in expectation of the shift to t
Autor:
Akira Takadate, Chiyomi Murata, Shujiro Goya, Toshiharu Tanaka, Takeshi Kaneko, Toshinobu Masuda
Publikováno v:
Bulletin of the Chemical Society of Japan. 73:1213-1217
Novel fluorogenic coumarin derivatives appending 15-crown-5 ether as more active catalytic site were designed and synthesized for the fluorescence derivatization of carboxylic acids. From the stability constants (Ks) for complexation with metal aceta
Publikováno v:
Chemical and Pharmaceutical Bulletin. 48:256-260
Structural features of fluorescent methoxycoumarins were examined from the viewpoint of substituent effect and ring structure in connection with intramolecular charge-transfer (ICT). The fluorescence of methoxy- coumarins depended primarily upon the
Autor:
Takeshi Shinohara, Toshinobu Masuda, Mitsuru Irikura, Chiyomi Murata, Shujiro Goya, Akihiko Isobe, Akira Takadate
Publikováno v:
Analytical Sciences. 13:753-756
6, 7-Dimethoxycoumarins having various reactive groups such as bromoacetyl-, hydrazinocarbonyl- and chlorocarbonyl- groups at 3-position on coumarin ring were synthesized for the construction of a fluorescent derivatizing reagent-kit for carboxylic a
Publikováno v:
Bulletin of the Chemical Society of Japan. 68:3105-3110
Three coumarin reagents carrying crown-ether moieties as catalytic sites for the fluorescence derivatization of carboxylic acids were designed and synthesized. The catalytic abilities of these reagents were evaluated based on the stability constants
Autor:
Shujiro Goya, Mitsuru Irikura, Akira Takadate, Chiyomi Murata, Toshinobu Masuda, Toshiharu Tanaka
Publikováno v:
Analytical Sciences. 11:97-101
The fluorescence characteristics of various methoxycoumarin fluorophores for the development of fluorescence reagents were examined in relation to their structures. The fluorescence emission mechanisms were also considered from the viewpoint of the i
Autor:
Toshinobu Masuda, Akira Takadate, Shujiro Goya, Hiroshi Miyahara, Toshiharu Tanaka, Chiyomi Murata
Publikováno v:
Chemistry Letters. 22:811-814
3-Bromoacetyl-6,7-[2′,3′-(1′,4′,7′,10′,13′-pentaoxacyclopentadeca)-2′-ene]coumarin (2) was prepared as a new fluorescence derivatization reagent for carboxylic acids in high-performance liquid chromatographic analysis. The derivatizat
Autor:
Akira Takadate, Shujiro Goya, Mitsuru Irikura, Chikako Tajima, Chiyomi Murata, Toshinobu Masuda
Publikováno v:
Analytical Sciences. 8:663-668
3-Bromoacetyl-7-methoxycoumarin (I) was synthesized as a highly reactive fluorescent derivatization reagent for use in high-performance liquid chromatographic analysis. Compound I readily reacted with carboxylic acids in acetone at room temperature f
Autor:
Chikako Haratake, Shujiro Goya, Mitsuru Irikura, Akihiko Isobe, Chiyomi Murata, Toshinobu Masuda, Akira Takadate
Publikováno v:
Analytical Sciences. 8:695-697