Zobrazeno 1 - 10
of 132
pro vyhledávání: '"Keiji Nakano"'
Autor:
Takashi KAKIUCHI, Ryunosuke TANIGO, Atsushi TANI, Takeshi YAMAZAKI, Kohta KOMATSUBARA, Keiji NAKANO, Masahiro YAMAMOTO
Publikováno v:
Electrochemistry, Vol 91, Iss 1, Pp 013001-013001 (2023)
A reference electrode equipped with ionic liquid salt bridge consisting of tributyl(2-methoxyethyl)phosphonium bis(pentafluoroethanesulfonyl)amide has been employed for potentiometric precipitation titration of chloride with silver ions in water at 2
Externí odkaz:
https://doaj.org/article/0506e5f97cc2464ba01709eda2f97a3c
Autor:
Yoshitoki Yanagimoto, Shoichiro Taniuchi, Yuko Ishizaki, Keiji Nakano, Naoki Hosaka, Kazunari Kaneko
Publikováno v:
Allergology International, Vol 66, Iss 4, Pp 621-623 (2017)
Externí odkaz:
https://doaj.org/article/0d697430c641492993f6a222a4540b48
Autor:
Yoshiyasu Ichikawa, Keiji Nakano, Mitsutoshi Maeda, Seiya Sato, Keisuke Nakanishi, Seijiro Hosokawa, Toshiya Masuda, Yutaro Udagawa
Publikováno v:
Organicbiomolecular chemistry. 18(4)
The first total synthesis of a marine natural product, exigurin, has been accomplished in 13 steps starting from (+)-menthone. The key intermediate (−)-10-epi-axisonitrile-3 was prepared by stereoselective intramolecular cyclopropanation followed b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc4c60904e9023032d653b703c73ecd6
https://pubmed.ncbi.nlm.nih.gov/31903473
https://pubmed.ncbi.nlm.nih.gov/31903473
Autor:
Yoshiyasu Ichikawa, Atsushi Okuyama, Hiyoshizo Kotsuki, Shiori Nunokawa, Keiji Nakano, Keisuke Yamashita, Tadaharu Ueda, Kazuya Oki
Publikováno v:
Synlett. 28:597-600
A new convenient method for the asymmetric transfer allylation of aromatic aldehydes was developed. The reaction gave the best results using a chiral allyl donor molecule derived from (–)-menthone in the presence of heteropoly acids supported on si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1075418eac4801ec9fac59c9205e5a97
https://doi.org/10.1055/s-0036-1588121
https://doi.org/10.1055/s-0036-1588121
Autor:
Yuya Nomoto, Nobuo Nishiyama, Yoshiyasu Ichikawa, Keiji Nakano, Ryo Horinouchi, Hiyoshizo Kotsuki
Publikováno v:
Synlett. 28:265-269
An unprecedented metal-free catalytic system composed of trityl halides and thioureas has been found to be a convenient source for the generation of trityl cation species, and this cooperative catalytic system was proved to be highly effective for in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4bef487e197a8dac48a68d15e42d0764
https://doi.org/10.1055/s-0036-1588618
https://doi.org/10.1055/s-0036-1588618
Publikováno v:
Synlett. 26:2301-2305
The enantioselective Michael addition reaction of α-aryl-substituted lactams with electron-deficient olefins was efficiently catalyzed using chiral quaternary ammonium salts derived from cinchona alkaloids. This method was highly useful for the cons
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::01f579c0777053113c977588b66a8a8e
https://doi.org/10.1055/s-0035-1560090
https://doi.org/10.1055/s-0035-1560090
Autor:
Ayumi Kitamori, Yoshiyasu Ichikawa, Toshiya Masuda, Rika Mimura, Hiyoshizo Kotsuki, Akifumi Ikeda, Keiji Nakano
Publikováno v:
Synthesis. 47:3043-3048
One-pot syntheses of models of the right-hand portion and the central part of the respective structures of halichonadins Q and M, using the Ugi five-center four-component reaction (U-5C-4CR), were executed. The biomimetic strategy employed in these r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::82ef219bde18a13ee1490e87c4ec9d27
https://doi.org/10.1055/s-0034-1380438
https://doi.org/10.1055/s-0034-1380438
Autor:
Kouhei Kamei, Nobushige Hieda, Hiyoshizo Kotsuki, Keiji Nakano, Riki Watanabe, Ryo Horinouchi, Naoki Tatsumi, Yoshiyasu Ichikawa
Publikováno v:
European Journal of Organic Chemistry. 2015:4457-4463
The enantioselective Michael addition reaction of α-substituted cyclic ketones with acrylates was efficiently promoted by a primary amine chiral catalyst under high-pressure conditions (1.0 GPa) in tetrahydrofuran. This method was highly successful
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4fa51e479433047c3fa4318a77858b14
https://doi.org/10.1002/ejoc.201500411
https://doi.org/10.1002/ejoc.201500411
Autor:
Naomu Miyamae, Yoshiyasu Ichikawa, Maya Moritaka, Naruhisa Watanabe, Keiji Nakano, Hiyoshizo Kotsuki
Publikováno v:
Org. Biomol. Chem.. 12:5847-5855
A highly diastereoselective and enantioselective method for the asymmetric desymmetrization of 4,4-disubstituted cyclohexadienones using the Michael addition reaction of malonates under catalysis with the primary amine-thiourea conjugate catalyst and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f023ec6edccb34107cdc77b97125475c
https://doi.org/10.1039/c4ob00733f
https://doi.org/10.1039/c4ob00733f
Autor:
Nobuyoshi Saeki, Yoshiyasu Ichikawa, Shohei Kusaba, Yumiko Tomita, Keiji Nakano, Toshiya Masuda, Hiyoshizo Kotsuki, Yuta Tonegawa, Takahiro Minami
Publikováno v:
Org. Biomol. Chem.. 12:3924-3931
A method for the protecting group free synthesis of β-urea-linked glycoconjugates has been developed. The one step process, involving reactions between urea and D-glucose, N-acetyl-D-glucosamine or D-xylose in acidic aqueous solution, furnishes the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b5e109b3eb4ffc3de59228c6fe14411
https://doi.org/10.1039/c3ob42452a
https://doi.org/10.1039/c3ob42452a