H
Hiroshi Kakisawa
Researcher at University of Tsukuba
Publications - 26
Citations - 867
Hiroshi Kakisawa is an academic researcher from University of Tsukuba. The author has contributed to research in topics: Absolute configuration & Diterpene. The author has an hindex of 14, co-authored 26 publications receiving 837 citations.
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Absolute configurations of marine diterpenes possessing a xenicane skeleton. An application of an advanced mosher's method
TL;DR: In this article, the absolute configurations of marine diterpenes, 7 and 8, were elucidated by means of Mosher's method using 1H NMR spectroscopy at 500 MHz.
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Absolute configurations of cytotoxic marine cembranolides; Consideration of mosher's method
TL;DR: In this paper, the stereochemistry of the cembranolides isolated from the soft coral Sinularia mayi has been elucidated by means of 2D NMR spectroscopy and X-ray crystallography.
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An allelopathic fatty acid from the brown alga Cladosiphon okamuranus
Hiroshi Kakisawa,Fumika Asari,Takenori Kusumi,Takeshi Toma,Takemaro Sakurai,Takeshi Oohusa,Yoshiaki Hara,Mitsuo Chiharai +7 more
TL;DR: The tetraunsaturated fatty acid exterminated toxic red tide planktons such as Chattonella antiqua at 1 ppm concentration.
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Anomaly in the modified Mosher's method: Absolute configurations of some marine cembranolides
TL;DR: In this article, the utility of modified Mosher's method is examined by applying it to three marine cembranolides, 2, 3, and 4, with known absolute configurations, and it is concluded that the method can be safely used for the, compounds with a sterically unhindered OH group, but care must be taken in applying to the secondary alcohols with the OH group located in a crowded environment.
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Cyanoviridin RR, a toxin from the cyanobacterium (blue-green alga) microcystis viridis
Takenori Kusumi,Takashi Ooi,Makoto M. Watanabe,Makoto M. Watanabe,Hiroshi Takahashi,Hiroshi Takahashi,Hiroshi Kakisawa +6 more
TL;DR: A toxin, named as cyanoviridin RR, has been isolated from the cyanobacterium Microcystis viridis and the structure of the toxin has been determined by modern NMR techniques such as the HMBC spectrum.