Výsledky vyhledávání

Efficient Syntheses of the OPC Homologous Series, OPC-1:0, -3:0, -4:0, -5:0, -6:0, -7:0, and-8:0

Autor: Hiroaki Toshima, Shinji Nara, Yasunori Koda, Yoshio Kikuta, Akitami Ichihara, Hisateru Aramaki

Publikováno v: Bioscience, biotechnology, and biochemistry. 61(10)

The OPC homologous series was synthesized from 2-[(Z)-2-pentenyl]cyclopenten-1-one in short steps and with high yields. The carbon-carbon bond formation was achieved by the 1,4-conjugate addition approach. This method makes it possible to supply a su

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5e19d07462f91060c45fc6e8c9cf8c7
https://pubmed.ncbi.nlm.nih.gov/27393169

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Akademický článek

Effect of difference in fixation methods of tendon graft and the microfracture procedure on tendon-bone junction healing

Autor: Satoshi Nezu, MD, Taichi Saito, MD, PhD, Aki Yoshida, PhD, Shinji Narazaki, MD, PhD, Yasunori Shimamura, MD, PhD, Takayuki Furumatsu, MD, PhD, Toshifumi Ozaki, MD, PhD

Publikováno v: JSES International, Vol 6, Iss 1, Pp 155-166 (2022)

Background: There are generally two methods of fixation for tendon grafts used in ligament reconstruction: bone tunnel fixation and anchor fixation. The microfracture (Mf) procedure is a technique to induce bleeding from the bone marrow, and the blee

Externí odkaz: https://doaj.org/article/bdb728857b864d208f3fc3363731fddc

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Syntheses and Potato Tuber-inducing Activity of Coronafacic Acid Analogues

Autor: Hiroaki Toshima, Yoshio Kikuta, Akitami Ichihara, Yasunori Koda, Shinji Nara

Publikováno v: Bioscience, Biotechnology, and Biochemistry. 62:681-688

Coronafacic acid (1) is an acid component of coronatine, and has been isolated from several pathovars of Pseudomonas syringae. Syntheses of C6-non- and C6-alkyl-substituted analogues of 1 were accomplished via intramolecular 1,6-conjugate addition as

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ba673eda4f7fc688a0a210ac9399b3f6
https://doi.org/10.1271/bbb.62.681

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Additive Pummerer reaction of heteroaromatic sulfilimines with carbon nucleophiles

Autor: Albert Padwa, Shinji Nara, Qiu Wang

Publikováno v: Tetrahedron Letters. 47:595-597

The additive Pummerer reaction of several heteroaromatic sulfilimines has been investigated. The overall process involves the reaction of the sulfilimine with TFAA to produce a transient N-tosyl-N-trifluoroacetyl sulfonium ion. Nucleophilic attack at

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::615e8355659311e431526dd7e757880d
https://doi.org/10.1016/j.tetlet.2005.11.026

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Asymmetric total syntheses of (+)-coronafacic acid and (+)-coronatine, phytotoxins isolated from Pseudomonas syringae pathovars

Autor: Akitami Ichihara, Hiroaki Toshima, Shinji Nara

Publikováno v: Tetrahedron. 53:9509-9524

Asymmetric total synthesis of (+)-coronafacic acid (2), was accomplished via intramolecular 1, 6-conjugate addition as the key step. The chiral ester (+)-7 was prepared via two approaches: starting from (R)-(+)-4-acetoxy-2-cyclopenten-1-one (12), and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::18464b90a0be9c1e796cd60f6673dea9
https://doi.org/10.1016/s0040-4020(97)00614-5

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Intramolecular 1,6-conjugate addition approach for construction of the hydrindane framework: Total synthesis of (±)-coronafacic acid

Autor: Akitami Ichihara, Shinji Nara, Hiroaki Toshima

Publikováno v: Tetrahedron Letters. 37:6745-6748

A new approach for the construction of the hydrindane framework has been achieved by intramolecular 1, 6-conjugate addition under some basic conditions. The precursors, α, β, γ, δ-unsaturated esters ( 11a-11d ) were synthesized from the ester 8 a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5290953b5d11c6e515eaaa4845c9255b
https://doi.org/10.1016/s0040-4039(96)01457-8

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ChemInform Abstract: Stereoselective Cyclization Mediated by Samarium(II) Iodide Using Allyl Sulfides and Sulfones as Ketyl Radical Acceptors

Autor: Fuyuhiko Matsuda, Shinji Nara, Haruhisa Shirahama, Shinya Ito, Toshiyuki Kan

Publikováno v: ChemInform. 26

This paper describes the new types of completely stereoselective cyclizations induced by samarium-(II) iodide using allyl sulfides or sulfones as a ketyl radical acceptor

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a7326152780d37ebe1d79dc8caee69b3
https://doi.org/10.1002/chin.199510062

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ChemInform Abstract: Total Synthesis of (-)-Grayanotoxin III

Autor: Seijiro Hosokawa, Shinji Nara, Haruhisa Shirahama, Toshiyuki Kan, Shinya Ito, Fuyuhiko Matsuda, Masato Oikawa

Publikováno v: ChemInform. 26

Total synthesis of (-)-grayanotoxin III (3), a unique tetracyclic diterpene isolated from the leaves of various plants of the family Ericaceae, has been successfully accomplished featuring the highly stereoselective cyclization reactions induced by S

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e847fcbaf119a3a2449e3199f9fbe2c9
https://doi.org/10.1002/chin.199514209

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