Search Results - "Ochi, Masamitsu"

Antitumor agents from the cashew (Anacardium occidentale) apple juice by Kubo, Isao, Ochi, Masamitsu, Vieira, Paulo C, Komatsu, Sakae

“…Three anacardic acids have been isolated as cytotoxic agents against BT-20 breast carcinoma cells from the cashew Anacardium occidentale (Anacardiaceae) apple…”
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Antimicrobial indolequinones from the mid-intestinal gland of the muricid gastropod Drupella fragum by Fukuyama, Yoshiyasu, Iwatsuki, Chie, Kodama, Mitsuaki, Ochi, Masamitsu, Kataoka, Kumi, Shibata, Kozo

“…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…”
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Stereoselective reduction of bicyclic ketals. A new, enantioselective synthesis of isolaurepinnacin and lauthisan skeletons by Kotsuki, Hiyoshizo, Ushio, Yasuyuki, Kadota, Isao, Ochi, Masamitsu

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Synthesis of novel chiral diazole ligands for enantioselective addition of diethylzinc to benzaldehyde by Kotsuki, Hiyoshizo, Hayakawa, Hiroyuki, Wakao, Masahiro, Shimanouchi, Tomoyasu, Ochi, Masamitsu

“…A variety of chiral pyrazole and imidazole derivatived ligands have been prepared under high pressure conditions and their catalytic efficiency in the…”
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Highly practical, enantiospecific synthesis of the cyclohexyl fragment of the immunosuppressant FK-506 by Kotsuki, Hiyoshizo, Nishikawa, Hideyuki, Mori, Yumi, Ochi, Masamitsu

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A new concise approach to the enantioselective synthesis of the hydroxyamino acid moiety of AI-77-B by KOTSUKI, H, IWASAKI, M, OCHI, M

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Sweet and bitter constituents of Wilbrandia species by Ochi, Masamitsu, Moriyama, Koichi, Ohmae, Kiyokazu, Fukuyama, Yoshiyasu, Nihei, Ken-ichi, Kubo, Isao

“…Two novel cucurbitane glycosides, wilbrandisides A and B were isolated as sweet-taste substances from the root of Wilbrandia species ( Cucurbitaceae) along…”
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Litophynins F, G, and H, three new diterpenoids from a soft coral Litophyton sp by OCHI, M, YAMADA, K, FUTATSUGI, K, KOTSUKI, H

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Acalycigorgins A, B, and C, three new biologically active diterpenoids from the gorgonian Acalycigorgia sp by OCHI, M, KATAOKA, K, TATSUKAWA, A, KOTSUKI, H, SHIBATA, K

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Revision of the Structures of Isodonal, Rabdolasional and Related Diterpenoids by TAKEDA, Yoshio, FUJITA, Tetsuro, SUN, Han-dong, MINAMI, Yoshinori, OCHI, Masamitsu, CHEN, Cheng-Chang

“…The structures of isodonal and rabdolasional were re-examined by means of two-dimensional nuclear magnetic resonance spectroscopy (2D-NMR) and were revised to…”
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High-pressure Diels-Alder reactions of 2-methylthio- and 2-acetoxyfuran. An efficient entry to 4-hydroxycyclohexanones by KOTSUKI, H, MORI, Y, OHTSUKA, T, NISHIZAWA, H, OCHI, M, MATSUOKA, K

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Ytterbium(III) trifluoromethanesulfonate catalyzed high pressure reaction of epoxides with indole. An enantioselective synthesis of (+)-diolmycin A2 by Kotsuki, Hiyoshizo, Teraguchi, Masahiro, Shimomoto, Nami, Ochi, Masamitsu

“…Epoxide opening reactions with indole are efficiently accelerated under high pressure conditions in the presence of a catalytic amount of ytterbium(III)…”
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Crinatusins, Bioactive Diels–Alder Adducts from Cyathocalyx crinatus by Shibata, Kozo, Tatsukawa, Akira, Umeoka, Ken-ichi, Lee, Hua Seng, Ochi, Masamitsu

“…From the stems of Cyathocalyx crinatus, a rain forest plant in Borneo, six new Diels–Alder adducts, named crinatusins A 1, A 2, B 1, B 2, C 1, and C 2,…”
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Drastic Structural Change in Silver(I) Complexes with Alteration of the Optical Activity of a Pyridine Derivative Ligand: Helical Arrays with Extended Structure and an Optically Inactive Dinuclear Complex by Suzuki, Takayoshi, Kotsuki, Hiyoshizo, Isobe, Kiyoshi, Moriya, Narimasa, Nakagawa, Yuichi, Ochi, Masamitsu

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A novel carbon-carbon bond-forming reaction of triflates with copper(I)-catalyzed Grignard reagents. A new concise and enantiospecific synthesis of (+)-exo-brevicomin, (5R,6S)-(-)-6-acetoxy-5-hexadecanolide, and L-factor by Kotsuki, Hiyoshizo, Kadota, Isao, Ochi, Masamitsu

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Antioxidative Bromoindole Derivatives from the Mid-Intestinal Gland of the Muricid Gastropod Drupella fragum by Ochi, Masamitsu, Kataoka, Kumi, Ariki, Saori, Iwatsuki, Chie, Kodama, Mitsuaki, Fukuyama, Yoshiyasu

“…Three new bromoindoles, 6-bromo-5-hydroxyindole (1), 6-bromo-4,5-dihydroxyindole (2), and 6-bromo-4,7-dihydroxyindole (3), were isolated from the midintestinal…”
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Molluscicides from the cashew Anacardium occidentale and their large-scale isolation by Kubo, Isao, Komatsu, Sakae, Ochi, Masamitsu

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New convenient, enantiospecific synthesis of ( S, S)- and ( R, R)-2,2′-bipyrrolidine derivatives by Kotsuki, Hiyoshizo, Kuzume, Hiroko, Gohda, Tetsushi, Fukuhara, Misako, Ochi, Masamitsu, Oishi, Tohru, Hirama, Masahiro, Shiro, Motoo

“…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…”
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A novel synthesis of optically active C2-symmetric pyridine derivatives. Efficient reaction of chiral triflates with 2-picolyllithium reagents by Kotsuki, Hiyoshizo, Nakagawa, Yuichi, Moriya, Narimasa, Tateishi, Hirotaka, Ochi, Masamitsu, Suzuki, Takayoshi, Isobe, Kiyoshi

“…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…”
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Efficient method for the reductive cleavage of acetals and ketals with Zn(BH4)2/Me3SiCl by Kotsuki, Hiyoshizo, Ushio, Yasuyuki, Yoshimura, Naka, Ochi, Masamitsu

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