Zobrazeno 1 - 10
of 129
pro vyhledávání: '"Yoshikazu Sugihara"'
Autor:
Seiji Komeda, Shigeharu Wakabayashi, Mitsumi Kuse, Yoshikazu Sugihara, Aimi Kida, Kazuyuki Tatsumi
Publikováno v:
Org. Biomol. Chem.. 12:5382-5387
3-(Diethylborylethynyl)pyridines 2 assemble into a cyclic trimer stabilized via intermolecular boron–nitrogen coordination bonds both in solution and in the crystalline state. The outstanding structural features of the methoxy derivative 2b in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c135cd655b1443d58906496a97482def
https://doi.org/10.1039/c4ob00849a
https://doi.org/10.1039/c4ob00849a
Publikováno v:
Tetrahedron. 65:7115-7121
In the presence of an active Ir-based catalyst, azulene underwent stepwise borylation with bis(pinacolato)diboron to produce polyborylated products. The reactivity of the ring atoms toward borylation was found to decrease in the following order: 2-po
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ecf90da7d4b89b3e08947d394da04572
https://doi.org/10.1016/j.tet.2009.06.053
https://doi.org/10.1016/j.tet.2009.06.053
Autor:
Toshihiro Murafuji, Masayuki Fujinaga, Kazuhiro Gyoji, Kei Kurotobi, Kouichi Suetake, Yoshikazu Sugihara
Publikováno v:
Synthesis. 2008:3745-3748
Azulene-2-boronic acid pinacol ester was conveniently transformed into 2-substituted azulenes bearing carboxyl, tormyl, ester, or amino groups, which are difficult to access by conventional methods. Furthermore, the azulene-2-carboxylic acid thus syn
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4650156cd5f39a59d32feaae1e24a5fa
https://doi.org/10.1055/s-0028-1083224
https://doi.org/10.1055/s-0028-1083224
Autor:
Nobuhiko Yamanouchi, Toshihisa Shibasaki, Takeo Ooishi, Yoshikazu Sugihara, Toshihiro Murafuji, Kei Kurotobi
Publikováno v:
The Journal of Organic Chemistry. 73:7971-7977
Directed lithiation of p-tolyl 1-azulenyl sulfone (1) at the 2-position of the azulenyl group was achieved by using lithium 2,2,6,6-tetramethylpiperidide (LTMP). The azulenyllithium thus generated could be efficiently trapped with various electrophil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::722b109b6affc9f37efc39c4ec336886
https://doi.org/10.1021/jo801166f
https://doi.org/10.1021/jo801166f
Autor:
Yuji Mikata, Toshihiro Murafuji, and Kei Kurotobi, Toshihisa Shibasaki, Kouichi Suetake, Yoshikazu Sugihara, A. F. M. Mustafizur Rahman, Nagao Azuma
Publikováno v:
Organometallics. 26:2971-2977
(1,3-Dihalo-2-azulenyl)diphenylphosphines 2 [halogen = Cl (a), Br (b)] and homologous bis(1,3-dihalo-2-azulenyl)phenylphosphines 4 have been synthesized, and the effect of the nonalternant azulenyl...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::88f8050c006e70b225ce8d1e7c0a10c1
https://doi.org/10.1021/om0607090
https://doi.org/10.1021/om0607090
Autor:
Yoshikazu Sugihara, Keiko Mochizuki, Rieko Suzuki, Shigeharu Wakabayashi, Makoto Shimizu, Yuri Kato, Mana Matsumoto
Publikováno v:
The Journal of Organic Chemistry. 72:744-749
A facile method for the synthesis of 1- and 2-pyridylazulenes, and of 1,3-dipyridylazulenes, is described. Color and spectral changes of these pyridylazulenes upon the addition of either acid or metal ions were investigated in detail. The color chang
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9f9aff1f0d182fd771ca7fa0e26a819
https://doi.org/10.1021/jo061684h
https://doi.org/10.1021/jo061684h
Autor:
Mamoru Jinguji, Yoshikazu Sugihara, Chizuko Kabuto, Mariko Ishihara, Susumu Sudoh, Tomoo Nakazawa, Mitsutaka Kudoh, Shigeyoshi Katagiri, Ryuta Miyatake, Hiroyuki Yamaguchi, Miwako Higashi
Publikováno v:
Bulletin of the Chemical Society of Japan. 79:1240-1247
The precise X-ray structures of furo[3,4-d]tropone (2), 2,4-dimethyl-8H-3-oxaheptalen-8-one (5), and 4,5-benzotropone (6) were determined. Their tropone rings show definite bond alternation and nea...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::23a643a6f74e738b153829bdd91ef14a
https://doi.org/10.1246/bcsj.79.1240
https://doi.org/10.1246/bcsj.79.1240
Autor:
Motoko Ishibashi, Toshihiro Murafuji, Yoshikazu Sugihara, Kouto Migita, A. F. M. Mustafizur Rahman, Yuji Mikata, Takako Azuma, Youhei Miyoshi
Publikováno v:
Bioorganic & Medicinal Chemistry Letters. 16:1510-1513
Inhibitory activity of organobismuth compounds, triarylbismuthanes 1 and their dihalides 2 and 3, was examined against jack bean urease. Besides triarylbismuth dichlorides 2, triarylbismuth difluorides 3 and bismuthanes 1 exhibited the activity. Of a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a09a74ba144429e1f90eb559dd09da7
https://doi.org/10.1016/j.bmcl.2005.12.034
https://doi.org/10.1016/j.bmcl.2005.12.034
Autor:
Toshihiro Murafuji, Youhei Miyoshi, A. F. M. Mustafizur Rahman, Motoko Ishibashi, Yoshikazu Sugihara
Publikováno v:
Journal of Organometallic Chemistry. 690:4280-4284
Competitive oxidative chlorination of p -substituted triarylstibines 3 [( p -XC 6 H 4 ) 3 Sb; a : X = OMe, c : Cl, d : CO 2 Et, e : CF 3 , f : CN, g : NO 2 ] by sulfuryl chloride was carried out against 3b (X = H) and the electronic effect of these s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8b699b6fe8ed8c007e4d93825453a5f0
https://doi.org/10.1016/j.jorganchem.2005.06.040
https://doi.org/10.1016/j.jorganchem.2005.06.040
Autor:
Toshihiro Murafuji, Nagao Azuma, A. F. M. Mustafizur Rahman, Kei Kurotobi, Yoshikazu Sugihara
Publikováno v:
Organometallics. 23:6176-6183
A nonalternant organyl ligand derived from azulene, a 1,3-dichloro-2-azulenyl group, is introduced for the first time into the bismuth and antimony center. Conversion of the azulenylbismuthanes into the pentacoordinated difluorides by xenon difluorid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7caa6370f49be7236f1cf5c7d84711ff
https://doi.org/10.1021/om040053f
https://doi.org/10.1021/om040053f