Výsledky vyhledávání - "Yasuko Tomotake"

Structure and stereochemistry of brianolide, a new antiinflammatory diterpenoid from the Okinawan gorgonian Briareum sp

Autor: L. S. Brinen, Takao Matsuzaki, R. S. Jacobs, Jie-fei Cheng, Hideshi Nakamura, K. J. S. Grace, Yasuko Tomotake, Yoko Kato, Yasushi Ohizumi, Jon Clardy, Jun'ichi Kobayashi

Publikováno v: Experientia. 47(5)

Brianolide (1), a new antiinflammatory diterpenoid of the briarein class, possessing a beta substituent at C-12 (R), has been isolated from the Okinawan gorgonian Briareum sp. Its structure has been established from spectral data in conjunction with

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::82f1784697301fb325edfe21f925ae90
https://pubmed.ncbi.nlm.nih.gov/1675176

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Hexacarbonylbis(tricyclopentylphosphine)dirhodium and hexacarbonylbis(triisopropylphosphine)dirhodium from a catalytic system for syngas conversion to ethylene glycol

Autor: Takeru Onoda, Yasuko Tomotake, Keisuke Wada, Kenji Murayama, Takao Matsuzaki, Eiichi Watanabe

Publikováno v: Journal of Organometallic Chemistry. 320:239-247

Two dimeric rhodium compounds, [Rh(CO)3P(c-C5H9)3]2 (1) and [Rh)CO)3P(i-Pr)3]2 (2) have been isolated from the catalytic reaction mixtures of syngas conversion to ethylene glycol, and their molecular structures without a bridging carbonyl were determ

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6fb20bcbdad6be748a8a88dd17f17468
https://doi.org/10.1016/s0022-328x(00)98980-0

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Synthesis and the Solid-State Conformations of Cross-Linked Resin-Bound Oligo(leucine)s.1,2 Internal Aggregations through the Intermolecular Hydrogen Bonding of the Oligopeptides on the Polymer Networks

Autor: Satoshi Nagasawa, Shizuko Isokawa, Yasuko Tomotake, Mitsuaki Narita

Publikováno v: Polymer Journal. 15:25-32

Cross-linked and soluble polystyrene resin-bound oligo(leucine)s were prepared by the step-by-step coupling of Boc-Leu3-OH to H-Phe-resins using dicyclohexylcarbodiimide and 1-hydroxy-1H-benzotriazole. The solid state conformational analysis of H–(

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::05f992649f92739bf86df0be3c42be86
https://doi.org/10.1295/polymj.15.25

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Crystalline-state reaction of cobaloxime complexes by x-ray exposure. 13. A stepwise structure analysis of the concerted process of racemization

Autor: Yasuko. Tomotake, Yuji Ohashi, Akira Uchida, Yoshio Sasada

Publikováno v: Journal of the American Chemical Society. 108:1196-1202

[(R)-1-cyanoethyl](3-methylpyridine) cobaloxime cristallise dans le systeme orthorhombique, groupe d'espace P2 1 2 1 2 1

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8af8776c980111f6727397c111323315
https://doi.org/10.1021/ja00266a013

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Crystalline-State Reaction of Cobaloxime Complexes by X-ray Exposure. XII. A New Type of Racemization with a Negligibly Small Change of the Cell Dimensions [1]

Autor: Yasuko. Tomotake, Yuji Ohashi, Yoshiaki Ohgo, A. Uchida, ShōE Baba, Yoshio Sasada

Publikováno v: Israel Journal of Chemistry. 25:327-333

Crystals of [(R)-1-cyanoethyl] bis(dimethylglyoximato)(diphenylmethyl-phosphine)cobalt(III), [Co(C3H4N)(C4H7N2O2)2(C13H13P)], on exposure to X-rays undergo crystalline-state racemization with a negligibly small change of the cell dimensions. At the i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::39f9adbd916558058cbbfc4bb40e2334
https://doi.org/10.1002/ijch.198500053

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Keramamine-A and -B, novel antimicrobial alkaloids from the Okinawan marine sponge sp

Autor: Shongzhi Deng, Takao Matsuzaki, Hideshi Nakamura, Yasuko Tomotake, Yoshimasa Hirata, Junichi Kobayashi, Yasushi Ohizumi

Publikováno v: Tetrahedron Letters. 28:621-624

Keramamine-A and -B, two new β-carboline alkaloids with a 13 membered ring have been isolated from the Okinawan marine sponge Pellina sp. as antimicrobial substances and the structures of keramamine-A and -B have been determined by X-ray analysis an

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a2f46e4daf3ac1d5dee372551a986964
https://doi.org/10.1016/s0040-4039(00)95796-4

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Naphthoquinone methide type near-i.r. dye: the properties and structure of 4-(2′-acetylamino-4′-diethylaminophenylimino)-1,4-dihydronaphthylidene- malononitrile

Autor: Yasuko Tomotake, Shuichi Maeda, Yuji Kubo, Minoru Kuwana, Katsuhira Yoshida, Takao Matsuzaki

Publikováno v: J. Chem. Soc., Chem. Commun.. :35-37

The introduction of an acetylamino group at the 2′-position in the aniline ring of a naphthoquinone methide dye produced a red shift with a large increase in the molecular extinction coefficient in CHCI3 solution, and an intramolecular ring-closure

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ff435fe22e61e627e41ad45c82f55f67
https://doi.org/10.1039/c39890000035

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