Zobrazeno 1 - 10
of 107
pro vyhledávání: '"Masamitsu. Ochi"'
Autor:
Masamitsu Ochi, Koichi Moriyama, Yoshiyasu Fukuyama, Ken-ichi Nihei, Isao Kubo, Kiyokazu Ohmae
Publikováno v:
Food Chemistry. 115:61-65
Two novel cucurbitane glycosides, wilbrandisides A and B were isolated as sweet-taste substances from the root of Wilbrandia species (Cucurbitaceae) along with seven known cucurbitane glycosides. Their structures were determined by spectroscopic mean
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dd5d55d2f802917790fc03b501fe4108
https://doi.org/10.1016/j.foodchem.2008.11.062
https://doi.org/10.1016/j.foodchem.2008.11.062
Publikováno v:
Tetrahedron. 56:8821-8824
From the stems of Cyathocalyx crinatus, a rain forest plant in Borneo, six new Diels–Alder adducts, named crinatusins A1, A2, B1, B2, C1, and C2, together with a known chalcone derivative, 4′,6′-dihydroxy-3′,5′-dimethyl-2′-methoxychalcone
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a7c837d7f337a6187df3903c28969a6c
https://doi.org/10.1016/s0040-4020(00)00812-7
https://doi.org/10.1016/s0040-4020(00)00812-7
Publikováno v:
Tetrahedron. 54:10007-10016
Three new indolequinones, 6-methoxyindole-4,7-quinone (1), 5-methoxyindole-4,7-quinone (2) and 5-methylindole-4,7-quinone (3) were isolated from the mid-intestinal gland of the muricid gastropod Drupella fragum. The structures of 1 and 2 were establi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bd72941df953d92a12eb7413cfda839f
https://doi.org/10.1016/s0040-4020(98)00593-6
https://doi.org/10.1016/s0040-4020(98)00593-6
Publikováno v:
Tetrahedron Letters. 37:3727-3730
Epoxide opening reactions with indole are efficiently accelerated under high pressure conditions in the presence of a catalytic amount of ytterbium(III) trifluoromethanesulfonate to afford tryptophol derivatives. The procedure is successfully applied
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4a9c305f837ec448c9c72af6817c3b8d
https://doi.org/10.1016/0040-4039(96)00670-3
https://doi.org/10.1016/0040-4039(96)00670-3
Publikováno v:
Tetrahedron: Asymmetry. 6:2665-2668
A variety of chiral pyrazole and imidazole derivatived ligands have been prepared under high pressure conditions and their catalytic efficiency in the enantioselective addition of diethylzinc to benzaldehyde has been examined.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dc7d4ad4a2e1ad630d10518e1b2fb6b0
https://doi.org/10.1016/0957-4166(95)00352-p
https://doi.org/10.1016/0957-4166(95)00352-p
Autor:
Motoo Shiro, Tohru Oishi, Masamitsu Ochi, Misako Fukuhara, Tetsushi Gohda, Hiroko Kuzume, Masahiro Hirama, Hiyoshizo Kotsuki
Publikováno v:
Tetrahedron: Asymmetry. 6:2227-2236
An enantiomeric pair of ( S , S )- and ( R , R )-bipyrrolidine derivatives has been prepared from D- and L-tartaric acids or D-mannitol as optically active starting materials. Taking advantage of the C 2 -symmetric nature of these chiral sources, the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::46564c4d8deecf5d0744f73ac83aa83d
https://doi.org/10.1016/0957-4166(95)00297-3
https://doi.org/10.1016/0957-4166(95)00297-3
Autor:
Narimasa Moriya, Hirotaka Tateishi, Takayoshi Suzuki, Yuichi Nakagawa, Hiyoshizo Kotsuki, Kiyoshi Isobe, Masamitsu Ochi
Publikováno v:
Tetrahedron: Asymmetry. 6:1165-1174
A variety of optically active C 2 -symmetric pyridine derivatives have been prepared from L- or D-tartaric acid as a chiral source via efficient coupling reactions of triflates with 2-picolyllithium reagents, and the utility of 17 and 18 as chiral li
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::94a09723c0a805dab52d33bc61456334
https://doi.org/10.1016/0957-4166(95)00142-c
https://doi.org/10.1016/0957-4166(95)00142-c
Publikováno v:
Bulletin of the Chemical Society of Japan. 67:599-602
The reactions of α-trimethylsiloxy-, α-methoxy-, and α-ethoxystyrene with dimethyl acetylenedicarboxylate (DMAD) and dimethyl fumarate (DMFM) have been investigated. With DMAD the 1 : 1 Diels–Alder and the 1 : 2 Diels–Alder ene adducts were ob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::63206d024cf6a216b7290ae4b86a35fb
https://doi.org/10.1246/bcsj.67.599
https://doi.org/10.1246/bcsj.67.599
Autor:
Yoshiyasu Fukuyama, Masamitsu Ochi, Saori Ariki, Akira Tatsukawa, Kozo Shibata, Hiyoshizo Kotsuki
Publikováno v:
Chemistry Letters. 23:89-92
Four new bioactive polyacetylenes have been isolated from the marine sponge Petrosia sp. Their structures including absolute stereochemistry have been elucidated by spectral and chemical methods.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d40b1b71636f150e2dc29ad8b3cc333a
https://doi.org/10.1246/cl.1994.89
https://doi.org/10.1246/cl.1994.89
Publikováno v:
Chemistry Letters. 22:2003-2006
Two new condensed guaiazulenoid pigments, gorgiabisazulene and gorgiagallylazulene, have been isolated from a gorgonian Acalycigorgia sp. and their structures have been established on the basis of spectroscopic and chemical evidence.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b8507c59cd58fbe67cb42c020d54cbee
https://doi.org/10.1246/cl.1993.2003
https://doi.org/10.1246/cl.1993.2003