Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Natsuka Higashi"'
Publikováno v:
Organometallics. 20:4542-4553
A new P-chirogenic diphosphine, (S,S)-α,α‘-bis(tert-butylmethylphosphino)-o-xylene (1), was synthesized in two steps from optically active secondary phosphine-borane 4 via the corresponding diphosphine-borane 3. The Rh(I) complex (2) of 1 was cha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::82232b1a7fba00fb2b450f20f0d63d25
https://doi.org/10.1021/om010251w
https://doi.org/10.1021/om010251w
Publikováno v:
Journal of the American Chemical Society. 123:5268-5276
The asymmetric hydrogenation of aryl- and alkyl-substituted enamides catalyzed by Rh-BisP complex affords optically active amides with very high ee values. The Rh-MiniPHOS catalyst gives somewhat less satisfactory results. Hydrogenation of the aryl-s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0bcda30e645b756162c724298d9e3ee4
https://doi.org/10.1021/ja010161i
https://doi.org/10.1021/ja010161i
Autor:
Ilya D. Gridnev, Natsuka Higashi, Yoshinori Yamanoi, Tsuneo Imamoto, Masaya Yasutake, Hideyuki Tsuruta
Publikováno v:
Advanced Synthesis & Catalysis. 343:118-136
A new class of chiral C2-symmetric bis(trialkyl)phosphine ligands has been prepared and used in Rh(I)-catalyzed asymmetric hydrogenation reactions. The ligands, 1,2-bis(alkylmethylphosphino)ethanes 1a-g(abbreviated as BisP*, alkyl = t-butyl, 1-adaman
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e6191bece6ff56d9072604414190f6f
https://doi.org/10.1002/1615-4169(20010129)343:1<118::aid-adsc118>3.0.co
https://doi.org/10.1002/1615-4169(20010129)343:1<118::aid-adsc118>3.0.co
Publikováno v:
Journal of the American Chemical Society. 122:7183-7194
The mechanism of asymmetric hydrogenation catalyzed by a new effective catalyst, viz., a rhodium complex of (S,S)-1,2-bis(tert-butylmethylphosphino)ethane (BisP*), has been studied by multinuclear NMR. Hydrogenation of the precatalyst [Rh(BisP*)(nbd)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8875bad67726e05830492af9ab877e56
https://doi.org/10.1021/ja000813n
https://doi.org/10.1021/ja000813n
Autor:
Michiko Kobayashi, Shigeru Watanabe, Natsuka Higashi, Katsuhira Yoshida, Yoshiyuki Takata, Kaori Hamanaka
Publikováno v:
Tetrahedron Letters. 41:4583-4586
An induced-fit type Ru(II) receptor 1 has been synthesized in which, upon approach of dicarboxylates, a highly flexible tetraamide binding site is organized to complement their chemical structures. Stereoselective optical sensing has been demonstrate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5231fa2e4ad95e9601222462424f267a
https://doi.org/10.1016/s0040-4039(00)00635-3
https://doi.org/10.1016/s0040-4039(00)00635-3
Autor:
Tsuneo Imamoto, Hideyuki Tsuruta, Masaya Yasutake, Yoshinori Yamanoi, Ilya D. Gridnev, Natsuka Higashi
Publikováno v:
ChemInform. 32
A new class of chiral C2-symmetric bis(trialkyl)phosphine ligands has been prepared and used in Rh(I)-catalyzed asymmetric hydrogenation reactions. The ligands, 1,2-bis(alkylmethylphosphino)ethanes 1a-g(abbreviated as BisP*, alkyl = t-butyl, 1-adaman
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cb2b4605ccd8dddd2bffade966628ae0
https://doi.org/10.1002/chin.200121032
https://doi.org/10.1002/chin.200121032
Publikováno v:
ChemInform. 32
Excellent enantioselectivities up to 99.7% were achieved in the hydrogenation of (E)-β-(acylamino)acrylates by the use of Rh(I)-complexes of electron-rich diphosphines, t-Bu-BisP* and t-Bu-MiniPHOS. Low-temperature NMR experiments testify that monoh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::668fd57c5c2d4dee612d891f19a4e3ec
https://doi.org/10.1002/chin.200136055
https://doi.org/10.1002/chin.200136055
Publikováno v:
ChemInform. 32
The asymmetric hydrogenation of aryl- and alkyl-substituted enamides catalyzed by Rh-BisP* complex affords optically active amides with very high ee values. The Rh-MiniPHOS catalyst gives somewhat less satisfactory results. Hydrogenation of the aryl-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::286d1c7bfe73fa33b99e76f50df14293
https://doi.org/10.1002/chin.200139031
https://doi.org/10.1002/chin.200139031
Publikováno v:
Organic letters. 3(11)
Excellent enantioselectivities up to 99.7% were achieved in the hydrogenation of (E)-beta-(acylamino)acrylates by the use of Rh(I)-complexes of electron-rich diphosphines, t-Bu-BisP and t-Bu-MiniPHOS. Low-temperature NMR experiments testify that mono
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::27aa489d45f01d3569255d4eef5c58b9
https://pubmed.ncbi.nlm.nih.gov/11405690
https://pubmed.ncbi.nlm.nih.gov/11405690
Publikováno v:
Journal of the American Chemical Society. 123:4631-4632
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77412bfdbf2cfa4459ff6d486634c4a5
https://doi.org/10.1021/ja015611l
https://doi.org/10.1021/ja015611l