Zobrazeno 1 - 10
of 98
pro vyhledávání: '"Katsuyuki NAKASHIMA"'
Publikováno v:
Molecules, Vol 9, Iss 7, Pp 541-549 (2004)
Allylic alcohols were isomerized into ketones by the action of the Grubbs reagent. Some model alcohols were prepared and tested under similar conditions to reveal that less substituted alkenes rearrange more easily. More hindered alcohols are stable
Externí odkaz:
https://doaj.org/article/c0c0593aa4124ea7a3a3aa3eb32f0f3b
Publikováno v:
Molecules, Vol 8, Iss 12, Pp 882-885 (2003)
(12E,14E,17E)-11-Hydroxy-12,14,17-dodecatrienoic acid was isolated from the stems of Ilex integra and its structure was determined on the basis of the spectroscopic data of its methyl ester.
Externí odkaz:
https://doaj.org/article/ba2781e0b528459c83f80c586b3c1e28
Autor:
Yoshinori Asakawa, Fumihiro Nagashima, Motoo Tori, Masakazu Sono, Masashi Imoto, Katsuyuki Nakashima
Publikováno v:
Molecules, Vol 7, Iss 7, Pp 517-527 (2002)
The title compounds have been synthesized starting from l-menthone by application of a ring-closing metathesis reaction to confirm their reported absolute and relative stereochemistry. Comparisons of the NMR spectra and specific rotations are also di
Externí odkaz:
https://doaj.org/article/95b49b55bb3d40f8bcd8d8d647836d1b
Publikováno v:
The Journal of Organic Chemistry. 86:15004-15010
Cyclic dinucleotides (CDNs) are second messengers composed of two purine nucleotides. In recent years, the structural diversity of CDNs and their functionality in biological processes are being intensely studied. Herein we report the chemical synthes
Autor:
Chiaki Kuroda, Saori Iga, Motoo Tori, Kie Hoshiyama, Yasuko Okamoto, Yoshinori Saito, Xun Gong, Katsuyuki Nakashima
Publikováno v:
Tetrahedron. 75:2239-2245
Secobakkane B (C-6/C-7 cleaved secobakkane type aldehyde), secovirgaurenols B and C (C-8/C-9 cleaved secoeremophilane type), a 1β,10β-epoxyfuranoeremophilane, two 1β,10β-epoxyeremophilanolides, and fukinospirolide C (bakkane-type lactone), as wel
Autor:
Chiaki Kuroda, Ryo Hanai, Xun Gong, Yuko Shiosaki, Yasuko Okamoto, Hiromi Nakamizo, Yosuke Matsuo, Motoo Tori, Miho Fujiwara, Kanako Otose, Kanako Mihara, Takashi Tanaka, Katsuyuki Nakashima, Yoshinori Saito
Publikováno v:
Chemical and Pharmaceutical Bulletin. 66:668-673
Chemical constituents of Ligularia hookeri (Asteraceae) collected in Yunnan and Sichuan Provinces in China were examined for the first time. Seven furanoeremophilanes, five of which were new, as well as known bisabolane- and eudesmane-type sesquiterp
Autor:
Yoshinori Saito, Xun Gong, Chiaki Kuroda, Motoki Hidaka, Akané Fukuda, Motoo Tori, Yasuko Okamoto, Eiji Watanabe, Katsuyuki Nakashima, Ryo Hanai
Publikováno v:
Phytochemistry Letters. 20:139-145
Chemical compositions and internal transcribed spacer (ITS) sequences of five samples of Ligularia lamarum collected in Sichuan Province, China, were analyzed. Fourteen compounds, including four new eremophilanes and one new seco-eremophilane, were i
Autor:
Tarashima, Noriko S., Yusuke Kumanomido, Katsuyuki Nakashima, Yoshiyuki Tanaka, Noriaki Minakawa
Publikováno v:
Journal of Organic Chemistry; 11/5/2021, Vol. 86 Issue 21, p15004-15010, 7p
Autor:
Masako Ito, Hatsuna Matsunaga, Motoo Tori, Hiroshi Minami, Katsuyuki Nakashima, Akihito Aiba, Norihiro Fujisaki
Publikováno v:
Natural product communications. 11(8)
Preparation of 13- to 19-membered carbocycles (metacyclophanes) from 1,3-disubstituted benzene derivatives has been successfully carried out using the RCM reaction, but similar starting materials having diphenyl ether did not cyclize to 15-membered c
Autor:
Kyoko Furuita, Hajime Sato, Chojiro Kojima, Takenori Dairaku, Jakub Šebera, Katsuyuki Nakashima, Akira Ono, Vladimír Sychrovský, Yoshiyuki Tanaka
Publikováno v:
Inorganica Chimica Acta. 452:34-42
Modern nucleic acids chemistry enabled us to create various types of metal-mediated base pairs (metallo-base-pairs). Nowadays, their structural/spectroscopic data have been accumulated. From the NMR spectroscopic point of view, data on Hg II /Ag I -m