Výsledky vyhledávání - "Yoshinobu, Naoshima"

Synthesis, Structural Characterization, and Preliminary Biological Characterization of Organotin Polyethers Derived from Hydroquinone and Substituted Hydroquinones

Autor: Kazutaka Nagao, Yoshinobu Naoshima, Kimberly Shahi, Charles E. Carraher, Michael R. Roner, Girish Barot

Publikováno v: Journal of Inorganic and Organometallic Polymers and Materials. 19:12-27

A variety of dibutyltin polyethers have been synthesized employing the interfacial polymerization technique. The products are polymers with degrees of polymerization ranging from 60 to 390. Infrared spectral and mass spectral results are consistent w

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::e89f34719e07546885bbc681172ffe92
https://doi.org/10.1007/s10904-008-9220-1

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Chemoenzymatic Synthesis of (R)-(+)-Patulolide A, a Macrolide Antibiotic Isolated from Penicillium urticae

Autor: Masaya Kitamura, Makoto Kamezawa, Takehiko Ohtani, Hiroyuki Nagaoka, Yoshinobu Naoshima, Hojun Tachibana

Publikováno v: Liebigs Annalen. 1996:167-170

(R)-(+)-Patulolide A [(R)-1] was synthesized with an enantiomeric purity of almost 100% e.e. by a two-step lipase-catalyzed enantioselective hydrolysis of racemic thioketal acetate (±)-11.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::96356c9b67694be0e397378bda2cb0cf
https://doi.org/10.1002/jlac.199619960204

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Enzyme immobilization utilizing a porous ceramics support for chiral synthesis

Autor: Yoshitaka Yamashita, Masanobu Kamori, Yoshinobu Naoshima

Publikováno v: Chirality. 14:558-561

A novel porous ceramics support, named "Toyonite," for the immobilization of enzymes was prepared from the minerals of kaolinite under acidic conditions. Modification of the porous surface of Toyonite with two different organic coating agents gave To

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d02b040e7f31553c381ca5fb01e7e2e
https://doi.org/10.1002/chir.10085

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Immobilization of lipase on a new inorganic ceramics support, toyonite, and the reactivity and enantioselectivity of the immobilized lipase

Autor: Masanobu Kamori, Tsuyoshi Hori, Yoshinobu Naoshima, Yoshitaka Yamashita, Yoshihiko Hirose

Publikováno v: Journal of Molecular Catalysis B: Enzymatic. 9:269-274

A porous ceramics support, Toyonite 200-M (TN-M), for the immobilization of lipases was prepared hydrothermally from the minerals of kaolinite. Compared with some other commercial solid supports, the TN-M one exhibited better stability and higher sel

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5b1d30c4bf4952ec79509d4f986283bb
https://doi.org/10.1016/s1381-1177(99)00105-8

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Chemoenzymatic synthesis of (+)-docosa-4,15-dien-1-yn-3-ol, a component of the marine sponge Cribrochalina vasculum, and confirmation of the structure and absolute configuration of the acetylenic alcohol, by lipase-catalysed biotransformations

Autor: Kiyoshi Morishita, Yoshinobu Naoshima, Makoto Kamezawa, Midori Kishimoto, Mayumi Kawase, Takehiko Ohtani, Hojun Tachibana

Publikováno v: Journal of the Chemical Society, Perkin Transactions 1. :513-518

The (4E,15Z)- and (4E,15E)-isomers of (+)-docosa-4,15-dien-1-yn-3-ol 1, isolated from the marine sponge Cribrochalina vasculum, were synthesized in highly enantiomerically pure form by lipase-mediated biotransformation with Novozym 435, and the struc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b5030b820427c8735a1dccc4e05772da
https://doi.org/10.1039/a807681b

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Enantioselectivity of Candida antarctica lipase for some synthetic substrates including aliphatic secondary alcohols

Autor: Takehiko Ohtani, Hojun Tachibana, Hiroki Nakatsukasa, Yoshinobu Naoshima, Makoto Kamezawa

Publikováno v: Journal of Molecular Catalysis B: Enzymatic. 4:53-60

Candida antarctica lipase (Novozym 435) showed good to high enantioselectivity in the acylation of aliphatic and aromatic secondary alcohols ( E = 38−166), and higher enantioselectivity in the hydrolysis of their corresponding acetates than other l

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::16c563cd68a11b135aaf11ed04bc6632
https://doi.org/10.1016/s1381-1177(97)00021-0

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Biocatalytic synthesis of (S)-2-tridecanyl acetate and (S)-2-pentadecanyl acetate, aggregation pheromone components ofDrosophila mulleri andD. busckii, by enantioselective hydrolysis with lipase

Autor: Makoto Kamezawa, Hojun Tachibana, Takehiko Ohtani, Yoshinobu Naoshima

Publikováno v: Journal of Chemical Ecology. 20:1057-1061

The two chiral pheromone acetates, (S)-2-tridecanyl acetate and (S)-2-pentadecanyl acetate, were synthesized with an enantiomeric excess (e.e.) of almost 100% byPseudomonas cepacia lipase-catalyzed hydrolysis of their corresponding racemic acetates i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68da6b09e1b55afc60963358bad6b2e3
https://doi.org/10.1007/bf02059742

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Biotransformation of acetophenone with immobilized cells of carrot, tobacco and Gardenia

Autor: Yoshihiko Akakabe, Yoshinobu Naoshima

Publikováno v: Phytochemistry. 35:661-664

Immobilized cells of Daucus carota transformed acetophenone into (S)-α-phenethyl alcohol by a stereoselective reduction pathway. Immobilized cells of Nicotiana tabacum also transformed the same substrate into the (S)-alcohol, but neither stereoselec

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dd8f96668651105300fa7b15f55a52c1
https://doi.org/10.1016/s0031-9422(00)90582-x

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