Zobrazeno 1 - 10
of 15
pro vyhledávání: '"Hirohito Ooka"'
Autor:
Noriyoshi Arai, Masaya Akashi, Takeshi Ohkuma, Hirohito Ooka, Satoshi Sugizaki, Tsutomu Inoue
Publikováno v:
Organic Letters. 12:3380-3383
Hydrogenation of 3-quinuclidinone and bicyclo[2.2.2]octan-2-one with a combined catalyst system of RuCl(2)[(S)-binap][(R)-iphan] and t-C(4)H(9)OK in 2-propanol afforded the chiral alcohols in 97-98% ee. 2-Diphenylmethyl-3-quinuclidinone was hydrogena
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::068413695111995b565ec4a38a1f4842
https://doi.org/10.1021/ol101200z
https://doi.org/10.1021/ol101200z
Autor:
Takuma Yasuda, Ryuhei Furue, Ashikari Yasuhiko, Natsuki Amanokura, Kyohei Matsuo, Hirohito Ooka
Publikováno v:
Advanced Optical Materials. 6:1701147
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::090839fd27fb5e048d765fcb71c6818c
https://doi.org/10.1002/adom.201701147
https://doi.org/10.1002/adom.201701147
Publikováno v:
Organic Letters. 6:2681-2683
A combined system of a RuCl(2)(binap)(1,4-diamine) complex and t-C(4)H(9)OK in i-C(3)H(7)OH catalyzes enantioselective hydrogenation of various 1-tetralone derivatives and some methylated 2-cyclohexenones. Hydrogenation of 2-methyl-1-tetralone under
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b1bfe60a3ac3dcefe00325a3e5b74405
https://doi.org/10.1021/ol049157c
https://doi.org/10.1021/ol049157c
Autor:
Masanori Wakabayashi, Takeshi Ohkuma, Hirohito Ooka, Kentaro Ohtsuga, Nobuhito Kurono, Tadahiro Kondo
Publikováno v:
The Journal of organic chemistry. 76(24)
Kinetic resolution of sterically hindered racemic α-tert-alkyl-α-hydroxy esters is performed by enantiomer-selective carbamoylation with the t-Bu-Box-Cu(II) catalyst (Box = bis(oxazoline)). The reaction with 0.5 equiv of n-C(3)H(7)NCO is carried ou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4421731c8430535bf1dbe321a94bdfe7
https://pubmed.ncbi.nlm.nih.gov/22034833
https://pubmed.ncbi.nlm.nih.gov/22034833
Publikováno v:
ChemInform. 27
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cbd7bf9497dd21c68e95c5285e3a8e89
https://doi.org/10.1002/chin.199608063
https://doi.org/10.1002/chin.199608063
Publikováno v:
ChemInform. 27
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a28fc84bcf431f902bdda8e002de2f8
https://doi.org/10.1002/chin.199649039
https://doi.org/10.1002/chin.199649039
Autor:
Tsutomu Inoue, Nobuhito Kurono, Takeshi Ohkuma, Tadahiro Kondo, Hiroto Tachikawa, Masanori Wakabayashi, Hirohito Ooka
Publikováno v:
Chemistry, an Asian journal. 3(8-9)
Enantiomer-selective carbamoylation of racemic alpha-hydroxy gamma-lactones with half equivalents of isocyanates in the presence of chiral Cu(II) catalysts was studied. Among a series of catalyst bearing chiral bis(oxazoline) (box) and pyridine(bisox
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a8c01e29a956942013fb6a994421d014
https://pubmed.ncbi.nlm.nih.gov/18461583
https://pubmed.ncbi.nlm.nih.gov/18461583
Autor:
Toshio Yabuuchi, Keita Azuma, Hirohito Ooka, Takeshi Ohkuma, Nobuhito Kurono, and Tsutomu Inoue, Noriyoshi Arai
Publikováno v:
ChemInform. 38
A catalyst system consisting of RuCl2[(S)-tolbinap][(R)-dmapen] and t-C4H9OK in 2-propanol effects asymmetric hydrogenation of arylglyoxal dialkylacetals to give the α-hydroxy acetals in up to 98% ee. Hydrogenation of racemic α-amidopropiophenones
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78b088641b1b040bf0d661fee6054b18
https://doi.org/10.1002/chin.200730028
https://doi.org/10.1002/chin.200730028
Autor:
Noriyoshi, Arai, Hirohito, Ooka, Keita, Azuma, Toshio, Yabuuchi, Nobuhito, Kurono, Tsutomu, Inoue, Takeshi, Ohkuma
Publikováno v:
Organic letters. 9(5)
[reaction: see text] A catalyst system consisting of RuCl2[(S)-tolbinap][(R)-dmapen] and t-C4H9OK in 2-propanol effects asymmetric hydrogenation of arylglyoxal dialkylacetals to give the alpha-hydroxy acetals in up to 98% ee. Hydrogenation of racemic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::69ac13230d29489605fbb8df0306bc0f
https://pubmed.ncbi.nlm.nih.gov/17263544
https://pubmed.ncbi.nlm.nih.gov/17263544
Publikováno v:
The Journal of Organic Chemistry. 61:4872-4873
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::92b3779f114a552ce1d4ebeaff78cc80
https://doi.org/10.1021/jo960997h
https://doi.org/10.1021/jo960997h