Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Toshinobu Masuda"'
Autor:
Ryusuke Hagihara, Satoru Karasawa, Kosuke Yamamoto, Go Hirai, Akio Ojida, Kazuteru Usui, Toshinobu Masuda, Hiroshi Suemune, Yuhei Ueno, Kazunobu Igawa, Katsuhiko Tomooka
Publikováno v:
Chemistry - A European Journal. 24:14617-14621
π-Conjugated helicenes containing heteroatoms have attracted significant attention due to their diverse chemical and electronic structures, as well as tunable physical properties. It was rationally anticipated that the self-assembly of coumarin-fuse
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5b99387ce7535ecf5bfd20e1665c25ab
https://doi.org/10.1002/chem.201803270
https://doi.org/10.1002/chem.201803270
Autor:
Satoru Kuwano, Toshinobu Masuda
Publikováno v:
Synthesis. 48:573-578
The N-heterocyclic carbene (NHC)-catalyzed monoacylation of vicinal diols is described. Monoacylated compounds of 1,2-, 1,3-, and 1,4-diols are obtained in good yields and selectivity under mild reaction conditions at ambient temperature.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f5eec83137183c1d5108da5faeadd92e
https://doi.org/10.1055/s-0035-1560544
https://doi.org/10.1055/s-0035-1560544
Autor:
Toshinobu Masuda, Satoru Kuwano
Publikováno v:
ChemInform. 47
The N-heterocyclic carbene (NHC)-catalyzed monoacylation of vicinal diols is described. Monoacylated compounds of 1,2-, 1,3-, and 1,4-diols are obtained in good yields and selectivity under mild reaction conditions at ambient temperature.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9c0a7db7717820f1eec1f769ee31b0ba
https://doi.org/10.1002/chin.201629057
https://doi.org/10.1002/chin.201629057
Autor:
Naoya Kishikawa, Kenichiro Nakashima, Maiko Kohno, Naotaka Kuroda, Shinya Yamaguchi, Akira Takadate, Toshinobu Masuda, Yoshihito Ohba, Kaname Ohyama
Publikováno v:
Analytica Chimica Acta. 665:74-78
In order to evaluate the chemiluminescence (CL) reagents for selective detection of reactive oxygen species (ROS), we comprehensively measured the CL responses of 20 CL reagents (three luminol derivatives, two imidazopyrazinone derivatives, eight lop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::422fbd9972f8963f79d52f64e29e92a6
https://doi.org/10.1016/j.aca.2010.03.025
https://doi.org/10.1016/j.aca.2010.03.025
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::94251e40d4e8d61cd4297c4eeae0be69
https://doi.org/10.1248/cpb.53.750
https://doi.org/10.1248/cpb.53.750
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d37359223ba730ed0007d69129298c6
https://doi.org/10.1246/bcsj.73.1213
https://doi.org/10.1246/bcsj.73.1213
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d1af2c0df237d61122e31253daa7b61
https://doi.org/10.1248/cpb.48.256
https://doi.org/10.1248/cpb.48.256
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a5f12af15d6b893f35f42d1afebf9ccf
https://doi.org/10.2116/analsci.13.753
https://doi.org/10.2116/analsci.13.753
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1467d3812461fb5348e35991b29391c2
https://doi.org/10.1246/bcsj.68.3105
https://doi.org/10.1246/bcsj.68.3105
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
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::796a0abb58a083aa174cfcd69d4d3cb7
https://doi.org/10.2116/analsci.11.97
https://doi.org/10.2116/analsci.11.97