Zobrazeno 1 - 10
of 130
pro vyhledávání: '"Yoshiteru Ida"'
Autor:
Mikio, Fujii, Hidehiro, Ando, Kiju, Konno, Motonori, Fukumura, Yumiko, Hori, Yasuaki, Hirai, Yoshiteru, Ida
Publikováno v:
Natural product communications. 12(3)
Based on NOE experiments, the structure of naphthodipyranodione from Gentianaceae plants was revised to 1,2-dihydro-4H,6H,8H-naphto[1,2-d:4,5- c'd']dipyrano-4,8-dione. Naphthodipyranodione was assumed to be formed by the degradation of gentiopicrosid
Autor:
Yoshiyuki Kuchino, Yoshiteru Ida, Yasuaki Hirai, Motonori Fukumura, Kazuo Toriizuka, Hidehiro Ando
Publikováno v:
Journal of Natural Medicines. 63:181-188
Achyranthoside H methyl ester (AH-Me) is an oleanolic acid saponin derivative isolated from the roots of Achyranthes fauriei through diazomethane treatment. AH-Me exhibited significant cytotoxicity against human breast cancer MCF-7 and MDA-MB-453 cel
Autor:
Yumiko Hori, Yasuaki Hirai, Yoshiteru Ida, Yoshiyuki Kuchino, Motonori Fukumura, Kazuo Toriizuka, Hidehiro Ando
Publikováno v:
Journal of Natural Medicines. 62:57-62
Two oleanolic acid saponins named achyranthosides G (1) and H (2) were newly isolated from Achyranthes fauriei root as methyl esters in addition to methyl esters of achyranthosides A - F and five oleanolic acid glucuronides (chikusetsusaponins IVa, V
Publikováno v:
Applied Microbiology and Biotechnology. 77:45-51
Amberlite XAD-7, a hydrophobic polymer, was used to change microbial reaction of ketones from reduction to Baeyer-Villiger (BV) oxidation. Thus, D. magnusii NBRC 4600 and G. reessii NBRC 1112 could catalyze the BV reaction of ketones in the presence
Autor:
Mikio Fujii, Yoshiteru Ida, Yumiko Hori, Yasuaki Hirai, Kazuo Toriizuka, Toshiro Shibata, Hidehiro Ando, Motonori Fukumura, Yujiro Niiho, Yoshijiro Nakajima
Publikováno v:
Journal of Natural Medicines. 61:269-279
We isolated and characterized 23 compounds, including a new iridoid named gentiolutelin and its dimethyl acetal, and a new lignan named gentioluteol from fresh roots (including small amounts of rhizome) of Gentiana lutea cultivated in Japan (Hokkaido
Autor:
Paula N. Kelly, Alok Goel, Steven Alley, Laurent Lehmann, Peter T.M. Kenny, Yoshiteru Ida, David Savage, Tara Hogan
Publikováno v:
Inorganic Chemistry Communications. 9:1267-1270
N-para-ferrocenyl benzoyl dipeptide esters 2–5 were prepared by coupling para-ferrocenyl benzoic acid 1 to the dipeptide ethyl esters GlyGly(OEt) 2, GlyAla(OEt) 3, GlyLeu(OEt) 4 and GlyPhe(OEt) 5. The compounds were fully characterized by a range o
Autor:
Yumiko Hori, Yasuaki Hirai, Yoshiteru Ida, Kazuo Toriizuka, Kaoru Nakamura, Mikio Fujii, Hiroyuki Akita, Motonori Fukumura
Publikováno v:
Tetrahedron: Asymmetry. 17:2292-2298
rac-Hept-1-en-3-ol 4 was subjected to an enantioselective esterification in the presence of Novozyme 435 and vinyl crotonate as the acyl donor to give (3S)-oct-1-en-3-yl crotonate 7 in >99% ee and (3R)-alcohol 4 in 99% ee. The E-value of this enzymat
Publikováno v:
Tetrahedron. 62:8687-8695
Chiral enolate derived from (4R)-4-tert-butyldiphenylsilyloxymethyl-4-butanolide 10 with lithium hexamethyldisilyazide (LiHMDS) was treated with trisyl azide, followed by addition of TMSCl to give (2S,4R)-2-azido-4-[(tert-butyldiphenylsilyloxy)methyl
Publikováno v:
Chemical and Pharmaceutical Bulletin. 54:387-390
Direct beta-glucosidation between (-)-myrtenol and nerol and D-glucose (3) using the immobilized beta-glucosidase from almonds with the synthetic prepolymer ENTP-4000 gave myrtenyl O-beta-D-glucoside (4) and neryl O-beta-D-glucoside (10), respectivel
Autor:
Hidehiro Ando, Tamotsu Tanaka, Yasuaki Hirai, Kaoru Hirano, Kiyoshi Satouchi, Tomoko Tsuji, Yoshiteru Ida, Junji Terao, Kazuma Yoshizumi
Publikováno v:
Journal of Agricultural and Food Chemistry. 54:335-341
Three known saponins, chiisanoside, 11-deoxyisochiisanoside, and isochiisanoside, and one novel saponin, 3,4-seco-4(23),20(29)-lupadiene-3,28-dioic acid 28-O-alpha-l-rhamnopyranosyl (1-->4)-beta-d-glucopyranosyl (1-->6)-beta-d-glucopyranoside, referr