Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Toshiro Suenaga"'
Publikováno v:
Bioscience, biotechnology, and biochemistry. 63(2)
To test the stereogenic effect of jasmonate on phytohormonal activities, methyl 7-epi-jasmonate (1b) and four stereoisomers of methyl cucurbate were easily prepared in racemic form: epimerization at the C-7 position of a commercially available methyl
Autor:
Shozo Fujioka, Sayoko Hiranuma, Shigeo Yoshida, Hiroyuki Koshino, Toshiro Suenaga, Hideharu Seto
Publikováno v:
Tetrahedron. 58:9741-9749
In order to probe the ligand recognition sites of brassinosteroid (BR)-receptors, B-ring modified brassinolides (BLs), i.e. 6a-carbaBL ( 3 ), 6a-carba-B-homoBL ( 4 ), the C-5 epimers of compounds 3 and 4 ( 6 and 7 , respectively), and 6-deoxo-6a-oxo-
Autor:
Toshiro Suenaga
Publikováno v:
Journal of Synthetic Organic Chemistry, Japan. 60:454-464
Publikováno v:
Tetrahedron Letters. 41:903-906
A very efficient convergent strategy for the construction of the trans -fused 6-6-6-6-membered tetracyclic ether ring system was developed based on the acetylide-triflate coupling of two tetrahydropyrans, oxidation of the alkyne group to an α-diketo
Publikováno v:
Tetrahedron Letters. 40:8855-8858
The first total syntheses of two α,β-unsaturated δ-lactones having a 1,3- syn -polyol moiety, isolated from Cryptocarya latifolia , were achieved. The key reactions include the Sharpless asymmetric epoxidation of the allyl alcohol, stereoselective
Autor:
Shigeo Yoshida, Hideharu Seto, Shozo Fujioka, Suguru Takatsuto, Toshiro Suenaga, Hiroyuki Koshino, Tsuyoshi Watanabe
Publikováno v:
Phytochemistry. 52:815-818
With a view to attaining more precise information on the biological activity of 2,3,5-tri-epi-brassinolide analogs, 2,3,5-tri-epi-brassinolide was prepared from 2,3-di-epi-brassinolide by direct epimerization at C-5. Biological activity of 2,3,5-tri-
Autor:
Shigeo Yoshida, Shozo Fujioka, Hiroyuki Koshino, Tsuyoshi Watanabe, Suguru Takatsuto, Toshiro Suenaga, Hideharu Seto
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 1. :3355-3358
Brassinolide 1 easily epimerized at C-5 by treatment with sodium methoxide in refluxing methanol via two intermediary methyl esters, and the subsequent re-lactonization with acid led to the formation of 5-epi-brassinolide 2 (42%) and 6(6a→3a)abeo-5
Autor:
Toshiro SUENAGA
Publikováno v:
Journal of the Mass Spectrometry Society of Japan. 45:265-288
Publikováno v:
THE JAPANESE JOURNAL OF EXPERIMENTAL SOCIAL PSYCHOLOGY. 35:70-79
When asked to generate any self-related information, subjects generally produce a higher recall score than when asked to recall experimenter-given information. This is known as the self-generation effect. To explain this effect, Itsukushima et al. (1
Publikováno v:
Tetrahedron Letters. 44:5799-5801
A real time monitoring method to monitor the progress of the solid-phase reaction has been developed. The substitution reaction on the solid-phase was clearly monitored as a change in the color depth using the fluorescent dansyl group as the leaving