Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Takushi Shiomi"'
Autor:
Yuichiro Kawamura, Takushi Shiomi, Kei-ichi Yasukawa, Shota Sawano, Hiromi Nakano, Hisato Matsumoto, Toshinari Ogiwara, Keiji Okinaka, Kazumasa Nagao, Kazunari Kawamoto
Publikováno v:
Proceedings of the International Display Workshops. :844
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8eaa03909f78eb295927348e6150bef5
https://doi.org/10.36463/idw.2019.0844
https://doi.org/10.36463/idw.2019.0844
Publikováno v:
Organic Letters. 11:1011-1014
The intermolecular reductive coupling reaction of cyclopent-2-enone and aromatic aldehydes was realized by chiral rhodium-(bisoxazolinyl)phenyl catalysts, Rh(Phebox-Ph)(OAc)(2)(H(2)O), with diphenymethylsilane as a hydride donor to give the correspon
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dea37cc41656b340f3c52924bd4e1644
https://doi.org/10.1021/ol802939u
https://doi.org/10.1021/ol802939u
Autor:
Megumi Kitase, Toru Hashimoto, Takushi Shiomi, Hisao Nishiyama, Takeshi Miyakawa, Jun-ichi Ito
Publikováno v:
Pure and Applied Chemistry. 80:743-749
A new class of phenyl-bis(oxazoline) auxiliaries was readily prepared from isophthaloyl chloride and appropriate β-amino alcohols, and the derived rhodium complexes underwent new cyclization reactions at the metal center and exhibited high catalytic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::74e8943d61a6a0f634f3296ad4b157ee
https://doi.org/10.1351/pac200880040743
https://doi.org/10.1351/pac200880040743
Publikováno v:
Tetrahedron. 63:12883-12887
Optically active dihydrocinnamate derivatives bearing the chiral carbon center at α-position were synthesized by Rh(Phebox)-catalyzed asymmetric reductive aldol coupling reaction with substituted cinnamates and benzaldehyde derivatives and subsequen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b2c9d38c1cfe2eb1f0fde380b6844a0d
https://doi.org/10.1016/j.tet.2007.10.055
https://doi.org/10.1016/j.tet.2007.10.055
Publikováno v:
European Journal of Organic Chemistry. 2006:5594-5600
Electronic effects of the substituents on the phenyl ring of the phenyl(bisoxazoline) ligand skeleton of rhodium catalysts was examined in the asymmetric reductive aldol reactions of acrylates and aldehydes. The electron-withdrawing NO2 group of Rh(4
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f1c99e3243abe66a190c2886cba973c3
https://doi.org/10.1002/ejoc.200600722
https://doi.org/10.1002/ejoc.200600722
Publikováno v:
Advanced Synthesis & Catalysis. 348:1235-1240
The bis(oxazolinyl)-3,5-dimethylphenylrhodium and -iridium complexes were synthesized in high yields by an efficient C-H bond activation method with 4,6-dimethyl-1,3-bis(oxazolinyl)benzene derivatives. The catalytic activity of the complexes was exam
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b508db8eeff06d6368e0511d4bd6bd60
https://doi.org/10.1002/adsc.200606049
https://doi.org/10.1002/adsc.200606049
Autor:
Takushi Shiomi, Jun-ichi Itoh, Yasunori Tsuchiya, Yoshihiko Yamamoto, Yoshinori Kanazawa, Kazuki Kobayashi, Hisao Nishiyama, Makoto Kikuchi
Publikováno v:
Chemistry - A European Journal. 12:63-71
New asymmetric conjugate reduction of beta,beta-disubstituted alpha,beta-unsaturated ketones and esters was accomplished with alkoxylhydrosilanes in the presence of chiral rhodium(2,6-bisoxazolinylphenyl) complexes in high yields and high enantiosele
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c085ea58403d14d12a68563a6b6dc9c
https://doi.org/10.1002/chem.200500841
https://doi.org/10.1002/chem.200500841
Publikováno v:
Synlett. 2004:2493-2496
Chiral rhodium(bisoxazolinylphenyl) complexes reduced α,β-unsaturated esters in high enantioselectivity up to 97-98% ee in the combination of alkoxyhydrosilanes.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e07ec28b19c76bdb332400d7addc95b
https://doi.org/10.1055/s-2004-834791
https://doi.org/10.1055/s-2004-834791
Publikováno v:
ChemInform. 41
Chiral rhodium–bisoxazolinylphenyl acetate complexes exhibited high catalytic activity for the β-boration of α,β-unsaturated carbonyl compounds with bis(pinacolato)diboron in the presence of sodium t-butoxide with enantioselectivity up to 97%.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99042e40852be5ccf7f0887db1b22a8f
https://doi.org/10.1002/chin.201009021
https://doi.org/10.1002/chin.201009021
Publikováno v:
Chemical communications (Cambridge, England). (40)
Chiral rhodium-bisoxazolinylphenyl acetate complexes exhibited high catalytic activity for the beta-boration of alpha,beta-unsaturated carbonyl compounds with bis(pinacolato)diboron in the presence of sodium t-butoxide with enantioselectivity up to 9
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c4fa242587d602ed09b3fa15394f26c5
https://pubmed.ncbi.nlm.nih.gov/19809619
https://pubmed.ncbi.nlm.nih.gov/19809619