Zobrazeno 1 - 10
of 55
pro vyhledávání: '"Katsumi NISHIMURA"'
Publikováno v:
Natural product communications. 11(7)
Chemical investigation of the tuber of Stephania cf. rotunda collected in Vietnam led to the isolation of a new stephaoxocane-type alkaloid, stepharotudine (1), twenty -eight known alkaloids, and two known amides. The chemical structures of the isola
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::8a61a9901ecf8fdee3ec7171e165522e
https://pubmed.ncbi.nlm.nih.gov/30452169
https://pubmed.ncbi.nlm.nih.gov/30452169
Autor:
Yasutomo Yamamoto, Ken-ichi Yamada, Tomohisa Yasuhara, Katsumi Nishimura, Mitsuaki Yamashita, Kiyoshi Tomioka, Takaaki Sumiyoshi, Naoshi Fukuyama
Publikováno v:
Tetrahedron. 71:7222-7226
The chiral diether ligand-controlled asymmetric conjugate addition of organolithiums to nona-2,7-dienedioate and subsequent intramolecular conjugate addition of the enolate intermediate gave all-trans trisubstituted cyclohexanes with high ee and yiel
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bce7b1ec8735769220e22265951c081f
https://doi.org/10.1016/j.tet.2015.03.014
https://doi.org/10.1016/j.tet.2015.03.014
Autor:
Shu-Jian Sun, Hideo Oshiro, Jun Yamada, Hiroshi Nakajima, Takao Tanahashi, Katsumi Nishimura, Yumi Sugimoto, Takahiro Toda, Atsuko Itoh
Publikováno v:
Journal of Pharmacy and Pharmacology. 67:1716-1722
Objectives We attempted to ascertain if bisbenzylisoquinoline alkaloids, liensinine and isoliensinine from Nelumbo nucifera Gaertner have antidepressant-like effects and compare the effects with those previously obtained by their analogue neferine. M
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::98f4f4de7e7cf27b5ccc991fbb9eb8bc
https://doi.org/10.1111/jphp.12473
https://doi.org/10.1111/jphp.12473
Autor:
Kiyoshi Tomioka, Katsumi Nishimura, Naoshi Fukuyama, Mitsuaki Yamashita, Takaaki Sumiyoshi, Yasutomo Yamamoto, Ken-ichi Yamada
Publikováno v:
Synthesis. 47:2256-2264
The chiral diether ligand controlled asymmetric conjugate addition of organolithiums to nona-2, 7-dienedioates preferentially proceeds via the s-cis conformation with coordination of the carbonyl oxygen atom to the lithium to give a lithium E-enolate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e83f4b41d7b47576d56499dabe51d4de
https://doi.org/10.1055/s-0034-1380702
https://doi.org/10.1055/s-0034-1380702
Publikováno v:
Chemical and Pharmaceutical Bulletin. 61:59-68
Bisbenzylisoquinoline alkaloid, nelumboferine which was recently isolated from the embryo of Nelumbo nucifera, and stereoisomers of neferine, which is a major alkaloid of the embryo of N. nucifera, were stereoselectively synthesized. Pharmacological
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ffee0478a032b059bca8346500675d7d
https://doi.org/10.1248/cpb.c12-00820
https://doi.org/10.1248/cpb.c12-00820
Publikováno v:
Journal of natural products. 79(7)
Chemical investigation of the fruits of Garcinia schomburgkiana collected in Vietnam led to the isolation of eight new schomburgkianones, A-H (1-8), four known (9-12) polyprenylated benzoylphloroglucinols, and four known biflavonoids. The structures
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::effc82e14aab2db556ff3e996fc0eae6
https://pubmed.ncbi.nlm.nih.gov/27409517
https://pubmed.ncbi.nlm.nih.gov/27409517
Publikováno v:
HETEROCYCLES. 97:865
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2b3327b0ddfc3cf4e215b6b0227576db
https://doi.org/10.3987/com-18-s(t)64
https://doi.org/10.3987/com-18-s(t)64
Autor:
Hiromi Yoshida, Chiaki Okuda, Manami Kishi, Takao Tanahashi, Katsumi Nishimura, Yukiko Takenaka, Yoshiyuki Mizushina
Publikováno v:
Chemical and Pharmaceutical Bulletin. 57:476-480
trans- and cis-Icosyl, docosyl, and tetracosyl p-coumarates, constituents of Artemisia annua L., and their structurally-related compounds were synthesized and evaluated for inhibitory activity on DNA polymerases alpha and beta. Among 30 compounds syn
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ecd96ac07ed66804d986d05338e4dc20
https://doi.org/10.1248/cpb.57.476
https://doi.org/10.1248/cpb.57.476
Publikováno v:
Bioorganic & Medicinal Chemistry Letters. 17:6417-6420
Stereoselective synthesis of 1, one of biologically active naphthoquinones from a Brazilian traditional medicine Tabebuia avellanedae, was achieved by utilizing Noyori reduction as a key step. Compound 1 displayed potent cytotoxicity against several
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ffa49b2a962c67eb2f63575d26276e57
https://doi.org/10.1016/j.bmcl.2007.10.005
https://doi.org/10.1016/j.bmcl.2007.10.005
Publikováno v:
Chemical and Pharmaceutical Bulletin. 52:1109-1113
Nitrogen-functionalized cyclohexane derivatives with three contiguous chiral centers were synthesized by nitroalkene-selective conjugate addition of phenyllithium to a omega-nitro-alpha,beta,psi,omega-unsaturated ester and subsequent stereocontrolled
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::142104f1d59d90a214857edeba34f1ac
https://doi.org/10.1248/cpb.52.1109
https://doi.org/10.1248/cpb.52.1109