Zobrazeno 1 - 10
of 21
pro vyhledávání: '"Hirofumi Seike"'
Autor:
Masaharu Nakamura, Hirofumi Seike, Tomoya Yokoi, Nobuhiro Yasuda, Ryota Yoshida, Takashi Iwaya, Hikaru Takaya, Kazuki Ogata, Toshio Takenaka, Katsuhiro Isozaki
Publikováno v:
Synlett. 24:1910-1914
A PCP pincer palladium-complex-bound norvaline, Boc- l -[Pd]Nva-OMe, was synthesized and fully characterized by NMR, FT-ICR-MS, and X-ray crystallography. Selective N- and C-terminus transformations of Boc- l -[Pd]Nva-OMe were performed by convention
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5d2f0f70b9a7ea9ff4c72cfaf8e8dcf2
https://doi.org/10.1055/s-0033-1339473
https://doi.org/10.1055/s-0033-1339473
Autor:
Ryota Yoshida, Hiroki Kurata, Kazuki Ogata, Masaharu Nakamura, Hirofumi Seike, Tomoya Yokoi, Nobuhiro Yasuda, Toshio Takenaka, Hikaru Takaya, Daisuke Sasano, Katsuhiro Isozaki, Tetsuya Ogawa
Publikováno v:
Chemistry - A European Journal. 19:12356-12375
The NCN-pincer Pd-complex-bound norvalines Boc-D/L-[PdCl(dpb)]Nva-OMe (1) were synthesized in multigram quantities. The molecular structure and absolute configuration of 1 were unequivocally determined by single-crystal X-ray structure analysis. The
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ed64663d9915d31497957d854232a76
https://doi.org/10.1002/chem.201301513
https://doi.org/10.1002/chem.201301513
Autor:
Toru Hashimoto, Kalum K. A. D. S. Kathriarachchi, Takuji Hatakeyama, Takeshi Zenmyo, Masaharu Nakamura, Hirofumi Seike
Publikováno v:
Angewandte Chemie International Edition. 51:8834-8837
Magnesium tetraalkylborates prepared from olefins, BH3·Me2S, and iPrMgCl under optimized conditions are coupled with various primary and secondary alkyl bromides to give the corresponding long-chain alkanes including fatty acid derivatives.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::208313f467d9d3ef19aa79da42526d4a
https://doi.org/10.1002/anie.201202797
https://doi.org/10.1002/anie.201202797
Autor:
Hirofumi Seike, Erik J. Sorensen
Publikováno v:
Synlett. 2008:695-701
Three key reactions, an efficient Ugi four-component coupling, a regiospecific, base-mediated elimination reaction, and an intramolecular nitrone/alkene [3+2] cycloaddition, were used to achieve an effective synthesis of the tricyclic molecular frame
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7bf2de95f8b779234c3d1b018aad1cd4
https://doi.org/10.1055/s-2008-1042813
https://doi.org/10.1055/s-2008-1042813
Publikováno v:
Organic Letters. 8:3865-3868
[structure: see text] The C5-C10 relative stereochemistry of sagittamide A was predicted, with the use of the 3JH,H profiles assembled from the spin-coupling constants reported in the literature. The predicted relative stereochemistry was then confir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c94da7b9af9b8129b577d9a185753cd7
https://doi.org/10.1021/ol061582d
https://doi.org/10.1021/ol061582d
Publikováno v:
Organic Letters. 8:3861-3864
[structure: see text] The feasibility of assembling 3JH,H profiles from NMR data collected on relevant, but not necessarily specific, NMR database compounds representing a given stereocluster was demonstrated. By this approach, the 3JH,H profile was
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8132d9617e4bda4590269764bb1c02e1
https://doi.org/10.1021/ol061580t
https://doi.org/10.1021/ol061580t
Autor:
Tomoya Yokoi, Masaharu Nakamura, Hirofumi Seike, Katsuhiro Isozaki, Hikaru Takaya, Daisuke Sasano, Kazuki Ogata
Publikováno v:
Chemistry Letters. 41:498-500
An NCN-pincer Pd-complex-bound norvaline-based supramolecular gel showed efficient catalytic activities for the intramolecular addition–cyclization of alkynoic acid and phenol derivatives in water ...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b9a2d00f9264ff4302aa190915b46968
https://doi.org/10.1246/cl.2012.498
https://doi.org/10.1246/cl.2012.498
Autor:
Hiroki Kurata, Tomoya Yokoi, Nobuhiro Yasuda, Hikaru Takaya, Tetsuya Ogawa, Katsuhiro Isozaki, Daisuke Sasano, Masaharu Nakamura, Hirofumi Seike, Kazuki Ogata
Publikováno v:
Chemistry Letters. 41:194-196
Novel NCN-pincer Pd-complex-bound norvaline derivatives were synthesized. The N- and C-termini-alkylated Pd–norvalines spontaneously assemble into fibrous aggregates to form supramolecular gels, in...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::79d0bfd377567e0cb378609398295026
https://doi.org/10.1246/cl.2012.194
https://doi.org/10.1246/cl.2012.194
Publikováno v:
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY. 132(38):13117-13119
A novel cross-coupling reaction of alkyl aryl sulfides with aryl Grignard reagents has been achieved to produce the alkenyl-aryl coupling products in high yields by using catalytic Ni(cod)(2) and a bulky N-heterocyclic carbene ligand, SIPr.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a5cdeb677de82525bea6999015bb9ac
http://hdl.handle.net/2433/146488
http://hdl.handle.net/2433/146488
Publikováno v:
Angewandte Chemie International Edition. 39:4593-4596
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe7fa2b8ca6771749fb14c609c90313f
https://doi.org/10.1002/1521-3773(20001215)39:24<4593::aid-anie4593>3.0.co
https://doi.org/10.1002/1521-3773(20001215)39:24<4593::aid-anie4593>3.0.co