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1

(+)-Kuraramine, a possible metabolite of (−)-N-methylcytisine in flowers of Sophora flavescens

Isamu Murakoshi, Eiji Kidoguchi, Joju Haginiwa, Shigeru Ohmiya, Kimio Higashiyama, Hirotaka Otomasu

Journal:

Year:

1981

Language:

english

File:

PDF, 311 KB

english, 1981

2

Isokuraramine and (−)-7,11-dehydromatrine, lupin alkaloids from flowers of Sophora flavescens

Isamu Murakoshi, Eiji Kidoguchi, Joju Haginiwa, Shigeru Ohmiya, Kimio Higashiyama, Hirotaka Otomasu

Journal:

Year:

1982

Language:

english

File:

PDF, 520 KB

english, 1982

3

Alkaloids of Thermopsis Lupinoides

Shigeru Ohmiya, Hirotaka Otomasu, Joju Haginiwa, Isamu Murakoshi

Journal:

Year:

1984

Language:

english

File:

PDF, 237 KB

english, 1984

4

Spiro heterocyclic compounds. VI. Synthesis of spiro(imidazolidine-4,1'-isoindoline) and related compounds.

TAHARA, SACHIYO, SHIGETSUNA, MARI, OTOMASU, HIROTAKA

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1982

File:

PDF, 710 KB

1982

5

Isolation of (+)-maackiamine (norammodendrine) from the flowers of Maackia amurensis

Kazuki Saito, Takaaki Yoshino, Toshikazu Sekine, Shigeru Ohmiya, Hajime Kubo, Hirotaka Otomasu, Isamu Murakoshi

Journal:

Year:

1989

Language:

english

File:

PDF, 176 KB

english, 1989

6

Lupin alkaloids from flowers of Echinosophora koreensis

Isamu Murakoshi, Masanao Watanabe, Tomoyo Okuda, Eiji Kidoguchi, Joju Haginiwa, Shigeru Ohmiya, Hirotaka Otomasu

Journal:

Year:

1985

Language:

english

File:

PDF, 229 KB

english, 1985

7

(−)-N-ethylcytisine, a lupin alkaloid from the flowers of Echinosophora koreensis

Isamu Murakoshi, Masanao Watanabe, Joju Haginiwa, Shigeru Ohmiya, Hirotaka Otomasu

Journal:

Year:

1982

Language:

english

File:

PDF, 178 KB

english, 1982

8

Synthesis of nitrophenylpiperidine N-oxides and their reductive intramolecular ring-closure.

TAKAHASHI, HIROSHI, SATO, SHIRO, OTOMASU, HIROTAKA

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1974

File:

PDF, 407 KB

1974

9

Studies on Phenazines. XVIII. Nitration of Phenazine and Its Derivatives. (3).

Otomasu, Hirotaka

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1958

File:

PDF, 651 KB

1958

10

Michael reactions of 3-acylmethyleneoxindoles with active methylene compounds.

HIGASHIYAMA, KIMIO, NAGASE, HIROMASA, YAMAGUCHI, RYOJI, KAWAI, KENICHI, OTOMASU, HIROTAKA

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1985

File:

PDF, 618 KB

1985

11

(−)-(trans-4′-hydroxycinnamoyl)lupinine. A new alkaloid in Lupinus seedlings

Isamu Murakoshi, Kaeko Sugimoto, Joju Haginiwa, Shigeru Ohmiya, Hirotaka Otomasu

Journal:

Year:

1975

Language:

english

File:

PDF, 207 KB

english, 1975

12

Lupin alkaloids from sophora chrysophylla

Isamu Murakoshi, Makoto Ito, Joju Haginiwa, Shigeru Ohmiya, Hirotaka Otomasu, Robert T. Hirano

Journal:

Year:

1984

Language:

english

File:

PDF, 489 KB

english, 1984

13

Antimalarial phenanthrene amino alcohols. 2. Trifluoromethyl-containing 9-phenanthrenemethanols

Nodiff, Edward A., Saggiomo, Andrew J., Shinbo, Masafu, Chen, Eugene H., Otomasu, Hirotaka, Kondo, Yasuaki, Kikuchi, Toyohiko, Verma, Basant L., Matsuura, Shin

Journal:

Journal of Medicinal Chemistry

Year:

1972

Language:

english

File:

PDF, 607 KB

english, 1972

14

Isolation of a New Alkaloid (-)-0- Acetylbaptifoline and the Absolute Stereochemical Relationships of Lupine Alkaloids in Thermopsis chinensis

Saito, Kazuki, Takamastsu, Satashi, Murakoshi, Isamu, Ohmiya, Shigeru, Otomasu, Hirotaka

Journal:

Journal of Natural Products

Year:

1989

Language:

english

File:

PDF, 263 KB

english, 1989

15

Synthesis of Condensed Quinoxalines. III. : 1, 2-Dihydroimidazo [1, 2-α]-quinoxalines and 1, 2-Dihydro-3H-pyrimido [1, 2-α] quinoxalines

OTOMASU, HIROTAKA, YOSHIDA, KEI, TAKAHASHI, HIROSHI

Journal:

YAKUGAKU ZASSHI

Year:

1970

File:

PDF, 563 KB

1970

16

Asymmetric synthesis of (R)-?-phenylalkylamines via alkylation of chiral hydrazones by Grignard reagents

Takahashi, Hiroshi, Tomita, Kouichi, Otomasu, Hirotaka

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1979

Language:

english

File:

PDF, 152 KB

english, 1979

17

Studies on the syntheses of heterocyclic compounds and natural products. MXVI. Aziridine in alkaloid synthesis. 6. Alternative synthesis of isopavine-type alkaloid, (.+-.)-reframidine.

KAMETANI, TETSUJI, HIGASHIYAMA, KIMIO, HONDA, TOSHIO, OTOMASU, HIROTAKA

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1984

File:

PDF, 536 KB

1984

18

Studies on Phenazines. XIII.

Yosioka, Itiro, Otomasu, Hirotaka

Journal:

YAKUGAKU ZASSHI

Year:

1956

File:

PDF, 519 KB

1956

19

Absolute Configuration of (+)-erythro-2-Methylamino-1, 2-diphenylethanol and Asymmetric Synthesis by Using Its Chirality

TAKAHASHI, HIROSHI, TOMITA, KOUICHI, NOGUCHI, HIROMI, OTOMASU, HIROTAKA

Journal:

YAKUGAKU ZASSHI

Year:

1979

File:

PDF, 677 KB

1979

20

A novel total synthesis of elaeocarpus alkaloids

Hirotaka Otomasu, Noriyuki Takatsu, Toshio Honda, Tetsuju Kametani

Journal:

Year:

1982

Language:

english

File:

PDF, 325 KB

english, 1982

21

(−)-3β-13α-dihydroxylupanine from cytisus scoparius

Isamu Murakoshi, Yoshiaki Yamashita, Shigeru Ohmiya, Hirotaka Otomasu

Journal:

Year:

1986

Language:

english

File:

PDF, 394 KB

english, 1986

22

Spiro heterocyclic compounds. I. Synthesis of spiro-(imidazolidine-4,3'-indoline)-2,2',5-triones.

OTOMASU, HIROTAKA, NATORI, KYUJI, TAKAHASHI, HIROSHI

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1975

File:

PDF, 640 KB

1975

23

Unusual reaction of 3-chloro-3-nitroalkylindolin-2-ones.

OTOMASU, HIROTAKA, YOSHIDA, KEI, NATORI, KYUJI

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1975

File:

PDF, 562 KB

1975

24

The synthesis of lupin alkaloids. II. A formal synthesis of (.+-.)-sparteine.

TAKATSU, NORIYUKI, NOGUCHI, MASAYO, OHMIYA, SHIGERU, OTOMASU, HIROTAKA

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1987

Language:

english

File:

PDF, 343 KB

english, 1987

25

Reaction of 6-Nitroquinoxalines with Potassium Cyanide

TAKAHASHI, HIROSHI, OTOMASU, HIROTAKA

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1970

File:

PDF, 593 KB

1970

26

Studies on Phenazines. XV. The Ring Cleavage of Phenazine. (1). 2, 3-Quinoxalinedicarboxylic Acid.

Yosioka, Itiro, Otomasu, Hirotaka

Journal:

Pharmaceutical Bulletin

Year:

1957

File:

PDF, 451 KB

1957

27

A New Synthesis of Trimethylhydroquinone

OTOMASU, HIROTAKA

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1968

File:

PDF, 412 KB

1968

28

Lupin alkaloids from the seeds of Thermopsis lupinoides

Kazuki Saito, Satoshi Takamatsu, Shigeru Ohmiya, Hirotaka Otomasu, Masaho Yasuda, Yoshihiro Kano, Isamu Murakoshi

Journal:

Year:

1988

Language:

english

File:

PDF, 180 KB

english, 1988

29

(−)-12-Cytisineacetic acid, a new lupin alkaloid in Euchresta japonica

Shigeru Ohmiya, Hirotaka Otomasu, Joju Haginiwa, Isamu Murakoshi

Journal:

Year:

1979

Language:

english

File:

PDF, 188 KB

english, 1979

30

An S-adenosyl-L-methionine; Cytisine methyltransferase in Thermopsis seedlings.

MURAKOSHI, ISAMU, SANDA, AKIHIRO, HAGINIWA, JOJU, SUZUKI, NOBORU, OHMIYA, SHIGERU, OTOMASU, HIROTAKA

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1977

File:

PDF, 539 KB

1977

31

Synthesis of Condensed Quinoxalines. II. A New Synthesis of Pyrrolo- [2, 3-b] quinoxalines

OTOMASU, HIROTAKA, OHMIYA, SHIGERU, SEKIGUCHI, TOSHIE, TAKAHASHI, HIROSHI

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1970

File:

PDF, 563 KB

1970

32

Intermolecular photoaddition reaction of aliphatic tert-amines to N-alkyl-2-pyridones.

OHMIYA, Shigeru, NOGUCHI, Masayo, CHEN, Chin-Yuen, MURAKOSHI, Isamu, OTOMASU, Hirotaka

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1989

File:

PDF, 515 KB

1989

33

Photoaddition Reaction of Pyrroles and Indoles to N-Methyl-2-pyridone.

OHMIYA, Sigeru, NOGUCHI, Masayo, INA, Shinji, KUBO, Hajime, OTOMASU, Hirotaka

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1992

File:

PDF, 694 KB

1992

34

(+)-11-oxocytisine, a lupin alkaloid from leaves of sophora secundiflora

Isamu Murakoshi, Hajime Kubo, Mohammad Ikram, Mohammad Israr, Nusrat Shafi, Shigeru Ohmiya, Hirotaka Otomasu

Journal:

Year:

1986

Language:

english

File:

PDF, 302 KB

english, 1986

35

Metabolic Products from Mycelium of Aspergillus itaconicus

Otomasu, Hirotaka, Watanabe, Emiko, Nakajima, Shoichi

Journal:

YAKUGAKU ZASSHI

Year:

1963

Language:

english

File:

PDF, 379 KB

english, 1963

36

Glycosidic alkaloids from Lupinus hirsutus

Satoshi Takamatsu, Kazuki Saito, Toshikazu Sekine, Shigeru Ohmiya, Hajime Kubo, Hirotaka Otomasu, Isamu Murakoshi

Journal:

Year:

1990

Language:

english

File:

PDF, 426 KB

english, 1990

37

(-)-5α-Hydroxysophocarpine, a New Lupin Alkaloid from the Seeds of Sophora flavescens var. angustifolia 1

Saito, Kazuki, Arai, Noriko, Sekine, Toshikazu, Ohmiya, Shigeru, Kubo, Hajime, Otomasu, Hirotaka, Murakoshi, Isamu

Journal:

Year:

1990

Language:

english

File:

PDF, 195 KB

english, 1990

38

Spiro heterocyclic compounds. V. Synthesis of spiro(homophthalimide-4,4'-(4'H-pyran)) compounds.

FUJIMAKI, TERUHISA, OTOMASU, HIROTAKA

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1982

File:

PDF, 612 KB

1982

39

Synthesis of condensed quinoxalines. VI. Synthesis of 1H-pyrazolo(3,4-b)quinoxaline N-oxides and related compounds.

YOSHIDA, KEI, OTOMASU, HIROTAKA

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1984

File:

PDF, 624 KB

1984

40

The Enzymatic Conversion of (-)-Lupinine to (-)-(trans-4'-Hydroxycinnamoyl) lupinine by Extracts of Lupinus Seedlings

MURAKOSHI, ISAMU, OGAWA, MAKOTO, TORIIZUKA, KAZUO, HAGINIWA, JOJU, OHMIYA, SHIGERU, OTOMASU, HIROTAKA

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1977

File:

PDF, 373 KB

1977

41

Studies on Phenazines. IV. : Synthesis of Iodinin Isomers. (1). : Syntheses of 2, 7-and 1, 8-Dihydroxyphenazine Di-N-oxides.

Yosioka, Itiro, Otomasu, Hirotaka

Journal:

Pharmaceutical Bulletin

Year:

1953

File:

PDF, 514 KB

1953

42

Studies on the Structures of Diazine N-Oxides. I

Otomasu, Hirotaka, Yamaguchi, Ryoji, Ishigo-oka, Kazuko, Takahashi, Hiroshi

Journal:

YAKUGAKU ZASSHI

Year:

1962

File:

PDF, 788 KB

1962

43

Lupin alkaloids from Sophora mollis

Isamu Murakoshi, Eiji Kidoguchi, Mohammad Ikram, Mohammad Israr, Nusrat Shafi, Joju Haginiwa, Shigeru Ohmiya, Hirotaka Otomasu

Journal:

Year:

1982

Language:

english

File:

PDF, 237 KB

english, 1982

44

Studies on Phenazines. VII. : Nitration of Phenazine and its Derivatives.

Otomasu, Hirotaka

Journal:

Pharmaceutical Bulletin

Year:

1954

File:

PDF, 776 KB

1954

45

Spiro heterocyclic compounds. III. Synthesis of spiro[oxindole-3,4'-(4'H-pyran)] compounds.

HIGASHIYAMA, KIMIO, OTOMASU, HIROTAKA

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1980

File:

PDF, 485 KB

1980

46

The synthesis of lupin alkaloids. I Total synthesis of (.+-.)-leontiformine and (.+-.)-leontiformidine.

Takatsu, Noriyuki, Ohmiya, Shigeru, Otomasu, Hirotaka

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1987

Language:

english

File:

PDF, 289 KB

english, 1987

47

(−)-(Trans-4′-rhamnosyloxycinnamyl) lupinine, a new lupin alkaloid in Lupinus luteus

Isamu Murakoshi, Fusako Kakegawa, Kazuo Toriizuka, Joju Haginiwa, Shigeru Ohmiya, Hirotaka Otomasu

Journal:

Year:

1977

Language:

english

File:

PDF, 212 KB

english, 1977

48

Lupin alkaloids from Echinosophora koreensis

Isamu Murakoshi, Eiji Kidoguchi, Megumi Kubota, Joju Haginiwa, Shigeru Ohmiya, Hirotaka Otomasu

Journal:

Year:

1982

Language:

english

File:

PDF, 330 KB

english, 1982

49

(−)-Epilamprolobine and its N-oxide, lupin alkaloids from Sophora tomentosa

Isamu Murakoshi, Eiji Kidoguchi, Minako Nakamura, Joju Haginiwa, Shigeru Ohmiya, Kimio Higashiyama, Hirotaka Otomasu

Journal:

Year:

1981

Language:

english

File:

PDF, 629 KB

english, 1981

50

A novel synthesis of the 2-benzylisoquinoline alkaloids, sendaverine and corgoine, with aziridinium salts as reactive intermediates

Otomasu, Hirotaka, Higashiyama, Kimio, Honda, Toshio, Kametani, Tetsuji

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1982

Language:

english

File:

PDF, 471 KB

english, 1982

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