Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Noriyuki Utsumi"'
Autor:
Takuma Kawada, Kenya Yabushita, Toshihisa Yasuda, Takeshi Ohta, Takaaki Yajima, Kouichi Tanaka, Noriyuki Utsumi, Masahito Watanabe, Kunihiko Murata, Yoshihito Kayaki, Shigeki Kuwata, Takeaki Katayama
Publikováno v:
The Journal of Organic Chemistry. 87:8458-8468
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b60b47b54d0a986a4a8ecfea1c34d9b6
https://doi.org/10.1021/acs.joc.2c00580
https://doi.org/10.1021/acs.joc.2c00580
Autor:
Kei Kawaguchi, Toshihisa Yasuda, Noriyuki Utsumi, Takeshi Ohkuma, Takeaki Katayama, Noriyoshi Arai, Kunihiko Murata
Publikováno v:
ChemCatChem. 10:3955-3959
The DIPSkewphos/PICA derivative-Ru(II) complexes catalyzed asymmetric hydrogenation of significantly sterically hindered 2',3',4',5',6'-pentamethylacetophenone, which was not reduced with NaBH4 at 25 degrees C, with a substrate-to-catalyst molar rati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bda946fd84452ff302d02170b852c57a
https://doi.org/10.1002/cctc.201800848
https://doi.org/10.1002/cctc.201800848
Autor:
Kunihiko Tsutsumi, Takeshi Ohkuma, Noriyoshi Arai, Kunihiko Murata, Noriyuki Utsumi, Hironori Satoh
Publikováno v:
Organic Letters. 15:3030-3033
Enantioselective hydrogenation of alkynyl ketones catalyzed by Ru(OTf)(TsDPEN)(η(6)-p-cymene) (TsDPEN = N-(p-toluenesulfonyl)-1,2-diphenylethylenediamine) affords the propargylic alcohols in up to 97% ee. The alkynyl moieties are left intact in most
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8c82239c8d9cf17b9b8405c17eb8543e
https://doi.org/10.1021/ol4012184
https://doi.org/10.1021/ol4012184
Autor:
Kunihiko Murata, Yonetatsu Matsumoto, Noriyuki Utsumi, Takeshi Ohkuma, Kunihiko Tsutsumi, Noriyoshi Arai
Publikováno v:
Advanced Synthesis & Catalysis. 354:2089-2095
The new catalyst system of RuBr2[(S,S)-xyl-skewphos][(S,S)-dpen] and potassium tert-butoxide shows high reactivity and enantioselectivity in the hydrogenation of N-arylimines [Xyl-Skewphos=2,4-bis(di-3,5-xylylphosphino)pentane, DPEN=1,2-diphenylethyl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3de2f3406b9933fcb1f0439d58752527
https://doi.org/10.1002/adsc.201200464
https://doi.org/10.1002/adsc.201200464
Asymmetric Hydrogenation of Aromatic Heterocyclic Ketones Catalyzed by the MsDPEN–Cp*Ir(III) Complex
Autor:
Masahiko Watanabe, Kunihiko Tsutsumi, Kunihiko Murata, Takeshi Ohkuma, Nobuhito Kurono, Noriyoshi Arai, Noriyuki Utsumi
Publikováno v:
Heterocycles. 80(1):141-147
Asymmetric hydrogenation of aromatic heterocyclic ketones catalyzed by Cp*Ir(OTf)(Msdpen) (MsDPEN = N-(methanesulfonyl)-1,2-diphenylethylenediamine) affords the heterocyclic alcohols in 93% to > 99% ee. The reaction is conducted in a methanolic solut
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::81f2ff55fc7360ba58c4cad524da61d2
http://hdl.handle.net/2115/45011
http://hdl.handle.net/2115/45011
Autor:
Kunihiko Murata, Nobuhito Kurono, Noriyuki Utsumi, Takeshi Ohkuma, Kunihiko Tsutsumi, Takeaki Katayama, Noriyoshi Arai
Publikováno v:
Organic Process Research & Development. 13:625-628
Asymmetric hydrogenation of 3-quinuclidinone with RuBr2[(S,S)-xylskewphos](pica) in a base containing ethanol affords (R)-3-quinuclidinol in 88−90% ee (XylSkewphos = 2,4-bis(di-3,5-xylylphosphino)pentane, PICA = α-picolylamine). The optical purity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4c237b4c4fa40a40d0e632fa0435b643
https://doi.org/10.1021/op9000302
https://doi.org/10.1021/op9000302
Autor:
Masami Sakamoto, Noriyuki Utsumi, Masaru Ando, Mizuho Saeki, Takashi Mino, Tsutomu Fujita, Akira Katoh, Takehiko Nishio, Choji Kashima
Publikováno v:
Angewandte Chemie. 115:4496-4499
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6c43a2c6c35b1b837fd3538694df6cc9
https://doi.org/10.1002/ange.200351660
https://doi.org/10.1002/ange.200351660
Autor:
Noriyoshi Arai, Noriyuki Utsumi, Masahito Watanabe, Takeshi Ohkuma, Kunihiko Murata, Kunihiko Tsutsumi
Publikováno v:
Organic Letters. 9:2565-2567
Asymmetric hydrogenation of a series of alpha-hydroxy aromatic ketones in methanol catalyzed by Cp*Ir(OTf)(MsDPEN) (MsDPEN = N-(methanesulfonyl)-1,2-diphenylethylenediamine) affords the 1-aryl-1,2-ethanediols in up to 99% ee. The reaction can be cond
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2beced7c55911af4eabd364ae03cb5e1
https://doi.org/10.1021/ol070964w
https://doi.org/10.1021/ol070964w
Autor:
Noriyoshi Arai, Noriyuki Utsumi, Hironori Satoh, Takeshi Ohkuma, Kunihiko Murata, Kunihiko Tsutsumi
Publikováno v:
ChemInform. 44
The highly enantioselective title reaction is presented for the first time and conducted with an S/C as high as 5000.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe3bf7ab9b1ca6719f949773391e3b08
https://doi.org/10.1002/chin.201347029
https://doi.org/10.1002/chin.201347029
Autor:
Noriyuki Utsumi, Noriyoshi Arai, Kunihiko Murata, Yonetatsu Matsumoto, Takeshi Ohkuma, Kunihiko Tsutsumi
Publikováno v:
ChemInform. 44
A series of imines derived from acetophenones is effectively hydrogenated with generally high yields and enantioselectivities and without any sensitivity against electronic effects.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::305318e2e614c87085348a74dc16751f
https://doi.org/10.1002/chin.201310067
https://doi.org/10.1002/chin.201310067