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    Article

    Functionalization of unactivated carbons in 3α,6- and 3α,24-dihydroxy-5β-cholane derivatives by dimethyldioxirane

    Direct remote functionalization of unactivated carbons by dimethyldioxirane (DMDO) was examined for 3α,6- and 3α,24-dihydroxy-5β-cholane derivatives. DMDO oxidation of stereoisomeric methyl 3α,6-diacetoxy-5β-c...

    Takashi Iida, Keisuke Shiraishi, Shoujiro Ogawa, Takaaki Goto, Nariyasu Mano… in Lipids (2003)

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    Article

    Biomimetic oxidation of unactivated carbons in steroids by a model of cytochrome P-450, oxorutheniumporphyrinate complex

    Biomimetic oxidation of unactivated carbons for structurally different steroids was studied with a model of cytochrome P-450, oxorutheniumporphyrinate complex, which is generated in situ by 2,6-dichloropyridine N

    Takashi Iida, Shoujiro Ogawa, Shouhei Miyata, Takaaki Goto, Nariyasu Mano… in Lipids (2004)

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    Article

    Lupane triterpenes with a carbonyl group at C-20 induce cancer cell apoptosis

    We evaluated the effects of various lupane triterpenes on B16 2F2 mouse melanoma cell differentiation and proliferation. All of the compounds tested (numbered 1–6) induced melanogenesis of B16 2F2 cells, a marker...

    Keishi Hata, Shoujiro Ogawa, Mitsuko Makino… in Journal of Natural Medicines (2008)

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    Article

    Stereoselective Synthesis and NMR Characterization of C-24 Epimeric Pairs of 24-Alkyl Oxysterols

    Two pairs of C-24 epimeric (24R)-/(24S)-24-hydroxy-24-methyl-5α-cholestan-3β-yl acetates and (24R)-/(24S)-25-hydroxy-24-methyl-5α-cholestan-3β-yl acetates as well as some related 24-ethyl oxysterol analogs were s...

    Shoujiro Ogawa, Hiroaki Kawamoto, Takashi Mitsuma, Hiroki Fujimori… in Lipids (2013)