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1

Study on the structures of 2-substituted iminothiazolidine derivatives

Masatoshi Sakae, Masanori Katsurada, Mayumi Watanabe, Fumio Yoneda, Sadao Nishigaki, Toshimasa Ishida

Journal:

Journal of Heterocyclic Chemistry

Year:

1997

File:

PDF, 268 KB

1997

2

A new synthesis of 1,2,3-thiadiazolo(4,5-d)pyrimidines

Keitaro Senga, Misuzu Ichiba, Sadao Nishigaki

Journal:

Tetrahedron Letters

Year:

1976

Language:

english

File:

PDF, 168 KB

english, 1976

3

On the pyrimidine synthesis from ethyl ethoxymethylenecyanoacetate and amidines

Sadao Nishigaki, Kyoko Aida, Keitaro Senga, Fumio Yoneda

Journal:

Tetrahedron Letters

Year:

1969

Language:

english

File:

PDF, 193 KB

english, 1969

4

Synthesis of iminodipyrimidines

Sadao Nishigaki, Keitaro Senga, Kazuko Ogiwara, Fumio Yoneda

Journal:

Tetrahedron Letters

Year:

1969

Language:

english

File:

PDF, 159 KB

english, 1969

5

A convinient synthesis of toxoflavins and toxoflavin-n-oxides

Fumio Yoneda, Kazuko Shinomura, Sadao Nishigaki

Journal:

Tetrahedron Letters

Year:

1971

Language:

english

File:

PDF, 157 KB

english, 1971

6

A new synthesis of fervenulin (1,3-dimethyl-7-azalumazine)

Fumio Yoneda, Michiko Kanahori, Kazuko Ogiwara, Sadao Nishigaki

Journal:

Journal of Heterocyclic Chemistry

Year:

1970

Language:

english

File:

PDF, 81 KB

english, 1970

7

Geometrical isomorism of ethyl N-(pyrimidinyl) aminomethylenceyanoacetates

Sadao Nishigaki, Kazuko Ogiwara, Fumio Yoneda

Journal:

Journal of Heterocyclic Chemistry

Year:

1971

File:

PDF, 332 KB

1971

8

A novel synthesis of 1,3-dimethyl-6-azalumazines

Fumio Yoneda, Michiko Kanahori, Sadao Nishigaki

Journal:

Journal of Heterocyclic Chemistry

Year:

1971

File:

PDF, 60 KB

1971

9

Geometrical isomerism of ethyl N-(2-pyridinyl)aminomethylenecyanoacetates

Sadao Nishigaki, Misuzu Ichiba, Kazuko Shinomura, Fumio Yoneda

Journal:

Journal of Heterocyclic Chemistry

Year:

1971

File:

PDF, 193 KB

1971

10

A new synthesis of fervenulin 4-oxide

Misuzu Ichiba, Keitaro Senga, Sadao Nishigaki, Fumio Yoneda

Journal:

Journal of Heterocyclic Chemistry

Year:

1977

File:

PDF, 72 KB

1977

11

New, convenient synthesis of 2-alkyl- and 2-vinylpyrazolo[3,4-d]-pyrimidine derivatives

Keitaro Senga, Yukako Kanamori, Hashime Kanazawa, Sadao Nishigaki

Journal:

Journal of Heterocyclic Chemistry

Year:

1978

File:

PDF, 291 KB

1978

12

A novel synthesis of 8-arylaminotheophyllines

Keitaro Senga, Misuzu Ichiba, Hashime Kanazawa, Sadao Nishigaki, Masatsugu Higuchi, Fumio Yoneda

Journal:

Journal of Heterocyclic Chemistry

Year:

1978

File:

PDF, 218 KB

1978

13

New syntheses of pyrimido[4,5-c]pyridazines related to fervenulin

Keitaro Senga, Junko Sato, Yukako Kanamori, Misuzu Ichiba, Sadao Nishigaki, Mitsukò Noguchi, Fumio Yoneda

Journal:

Journal of Heterocyclic Chemistry

Year:

1978

File:

PDF, 249 KB

1978

14

Synthesis and properties of thiazolo[5,4-d]pyrimidine 1-oxides

Keitaro Senga, Misuzu Ichiba, Hashime Kanazawa, Sadao Nishigaki

Journal:

Journal of Heterocyclic Chemistry

Year:

1982

File:

PDF, 297 KB

1982

15

Construction of pyrimido[5,4-e]-as-triazine, purine, v-triazolo-[4,5-d]pyrimidine and pyrazolo[3,4-d]pyrimidine ring systems from 5-arylazo-6-arylidenehydrazino-1,3-dimethyluracils

Sadao Nishigaki, Misuzu Ichiba, Kiyoko Fukami, Keitaro Senga

Journal:

Journal of Heterocyclic Chemistry

Year:

1982

File:

PDF, 259 KB

1982

16

A synthesis of lumazine derivatives

Fumio Yoneda, Ryosuke Koga, Sadao Nishigaki, Shinobu Fukazawa

Journal:

Journal of Heterocyclic Chemistry

Year:

1982

File:

PDF, 133 KB

1982

17

A new synthesis of pyrimido[5,4-e]-as-triazine 4-oxides and their ring transformation to pyrrolo[3,2-d]pyrimidines

Sadao Nishigaki, Hashime Kanazawa, Yukako Kanamori, Misuzu Ichiba, Keitaro Senga

Journal:

Journal of Heterocyclic Chemistry

Year:

1982

File:

PDF, 214 KB

1982

18

N-bromosuccinimide in heterocyclic synthesis. Synthesis of pyrazolo[3,4-d]pyrimidines, Pyrimido[5,4-e]-as-triazines, and pyrimido[4,5-c]pyridazines from 6-arylidenehydrazino-1,3-dimethyluracil derivatives

Hashime Kanazawa, Sadao Nishigaki, Keitaro Senga

Journal:

Journal of Heterocyclic Chemistry

Year:

1984

File:

PDF, 359 KB

1984

19

Synthetic antibacterials. VIII. 7-(1′-alkylhydrazino)-1,8-naphthyridines and related compounds

Sadao Nishigaki, Noriko Mizushima, Hashime Kanazawa, Misuzu Ichiba, Keitaro Senga

Journal:

Journal of Heterocyclic Chemistry

Year:

1985

File:

PDF, 224 KB

1985

20

Synthetic antibacterials. I. Nitrofurylvinyl-s-triazine derivatives

Nishigaki, Sadao, Yoneda, Fumio, Matsumoto, Hideko, Morinaga, Keiko

Journal:

Journal of Medicinal Chemistry

Year:

1969

Language:

english

File:

PDF, 384 KB

english, 1969

21

New syntheses of pyrido[3,2-d]pyrimidines

Keitaro Senga, Kiyoko Fukami, Hashime Kanazawa, Sadao Nishigaki

Journal:

Journal of Heterocyclic Chemistry

Year:

1982

File:

PDF, 229 KB

1982

22

A new synthesis of alloxazines

Yoneda, Fumio, Ichiba, Misuzu, Ogiwara, Kazuko, Nishigaki, Sadao

Journal:

Journal of the Chemical Society D Chemical Communications

Year:

1971

Language:

english

File:

PDF, 137 KB

english, 1971

23

Synthesis and properties of [1,2,3]thiadiazolo[4,5-d]pyrimidine derivatives including their mesoionic compounds. A new class of heterocycles

Senga, Keitaro, Ichiba, Misuzu, Nishigaki, Sadao

Journal:

Journal of Organic Chemistry

Year:

1978

Language:

english

File:

PDF, 762 KB

english, 1978

24

1,3-Dipolar cycloaddition of a thiazolo [5,4-d]pyrimidine 1-oxide to dimethyl acetylenedicarboxylate. New ring transformation to a pyrrolo-[3,2-d]pyrimidine via a pyrimido [4,5-b][1,4]thiazine

Senga, Keitaro, Ichiba, Misuzu, Kanazawa, Hashime, Nishigaki, Sadao

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1981

Language:

english

File:

PDF, 193 KB

english, 1981

25

Synthetic antibacterials. 4. Nitrofurylvinylpyrido[2,3-d]pyrimidine derivatives

Nishigaki, Sadao, Ogiwara, Kazuko, Fukazawa, Shinobu, Ichiba, Misuzu, Mizushima, Noriko, Yoneda, Fumio

Journal:

Journal of Medicinal Chemistry

Year:

1972

Language:

english

File:

PDF, 418 KB

english, 1972

26

New synthesis of purines from the reaction of 6-amino-1,3-dimethyl-5-nitrosouracil with benzylidenetriphenylphosphoranes

Senga, Keitaro, Kanazawa, Hashime, Nishigaki, Sadao

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1976

Language:

english

File:

PDF, 100 KB

english, 1976

27

Syntheses of azolopyrimido[5,4-e]-as-triazines and azolopyrimido[4,5-c]pyridazines related to fervenulin

Nishigaki, Sadao, Ichiba, Misuzu, Senga, Keitaro

Journal:

Journal of Organic Chemistry

Year:

1983

Language:

english

File:

PDF, 476 KB

english, 1983

28

New synthesis of pyrrolo[3,2-d]pyrimidines (9-deazapurines) by the 1,3-dipolar cycloaddition reaction of fervenulin 4-oxides with acetylenic esters

Senga, Keitaro, Ichiba, Misuzu, Nishigaki, Sadao

Journal:

Journal of Organic Chemistry

Year:

1979

Language:

english

File:

PDF, 610 KB

english, 1979

29

Synthesis of fervenulin 4-oxide and its conversion to the antibiotics fervenulin and 2-methylfervenulone

Ichiba, Misuzu, Nishigaki, Sadao, Senga, Keitaro

Journal:

Journal of Organic Chemistry

Year:

1978

Language:

english

File:

PDF, 509 KB

english, 1978

30

Synthetic antibacterials. 3. Nitrofurylvinyl-1,8-naphthyridine derivatives

Yoneda, Fumio, Nishigaki, Sadao, Mizushima, Noriko, Takahashi, Hiroshi

Journal:

Journal of Medicinal Chemistry

Year:

1971

Language:

english

File:

PDF, 371 KB

english, 1971

31

New synthesis of 1,3-dimethylcytosines

Yoneda, Fumio, Senga, Keitaro, Nishigaki, Sadao

Journal:

Journal of Organic Chemistry

Year:

1971

Language:

english

File:

PDF, 365 KB

english, 1971

32

Synthesis of 2-methylpteridine derivatives

Nishigaki, Sadao, Ogiwara, K., Yoneda, Fumio

Journal:

Journal of Medicinal Chemistry

Year:

1971

Language:

english

File:

PDF, 257 KB

english, 1971

33

A new pteridine synthesis

Yoneda, Fumio, Fukazawa, Shinobu, Nishigaki, Sadao

Journal:

Journal of the Chemical Society D Chemical Communications

Year:

1971

Language:

english

File:

PDF, 142 KB

english, 1971

34

A new purine synthesis

Yoneda, Fumio, Ogiwara, Kazuko, Kanahori, Michiko, Nishigaki, Sadao

Journal:

Journal of the Chemical Society D Chemical Communications

Year:

1970

Language:

english

File:

PDF, 159 KB

english, 1970

35

New synthesis of pteridines from the reaction of 6-amino-1,3-dimethyl-5-nitrosouracil with phenacylidenetriphenylphosphoranes

Senga, Keitaro, Kanazawa, Hashime, Nishigaki, Sadao

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1976

Language:

english

File:

PDF, 96 KB

english, 1976

36

A New, Convenient Synthesis of 2-Alkyl- and 2-Vinylpyrazolo [3,4- d ]pyrimidine Derivatives

SENGA, Keitaro, KANAMORI, Yukako, KANAZAWA, Hashime, NISHIGAKI, Sadao, YONEDA, Fumio

Journal:

Year:

1977

File:

PDF, 91 KB

1977

37

Synthesis of Pyrido[3,2- d ]pyrimidines by lntramolecular Cycloaddition of Azahexatrienes

Senga, Keitaro, Furukawa, Kiyoko, Nishigaki, Sadao

Journal:

Year:

1980

File:

PDF, 156 KB

1980

38

Synthetic Antibacterials. II. Synthesis of Pyrido [2, 3-d] pyrimidine Derivatives. (1)

NISHIGAKI, SADAO, OGIWARA, KAZUKO, SENGA, KEITARO, FUKAZAWA, SHINOBU, YONEDA, FUMIO, AIDA, KYOKO, MACHIDA, YOSHIHARU

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1970

File:

PDF, 940 KB

1970

39

Synthesis of 1-Substituted 1, 4-Dihydro-7-[2-(5-nitro-2-furyl) vinyl]-4-oxo-1, 8-naphthyridine Derivatives. I

NISHIGAKI, SADAO, YONEDA, FUMIO, OGIWARA, KAZUKO, NAITO, TAKEO, DOHMORI, RENZO, KADOYA, SHIZUO, TANAKA, YOSHIAKI, TAKAMURA, ISAO

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1969

File:

PDF, 644 KB

1969

40

1, 3, 6, 8-Tetramethy1-2, 4, 5, 7 (1H, 3H, 6H, 8H) pyrimido [5, 4-g] pteridinetetrone and 1, 3, 5, 7-Tetramethy1-2, 4, 6, 8 (1H, 3H, 5H, 7H)-pyrimido [4, 5-g] pteridinetetrone

YONEDA, FUMIO, NISHIGAKI, SADAO

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1971

Language:

english

File:

PDF, 452 KB

english, 1971

41

Synthesis of 1, 3-Dialkylcytosine Derivatives

NISHIGAKI, SADAO, SENGA, KEITARO, YONEDA, FUMIO

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1971

File:

PDF, 455 KB

1971

42

Condensation Reactions of Ethyl Ethoxymethylenecyanoacetate with Amidines

NISHIGAKI, SADAO, SENGA, KEITARO, AIDA, KYOKO, TAKABATAKE, TOYOMI, YONEDA, FUMIO

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1970

File:

PDF, 649 KB

1970

43

A Variant Route to Alloxazines

NISHIGAKI, SADAO, FUKAZAWA, SHINOBU, OGIWARA, KAZUKO, YONEDA, FUMIO

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1971

File:

PDF, 360 KB

1971

44

A Novel Synthesis of Iminodipyrimidines

NISHIGAKI, SADAO, SENGA, KEITARO, OGIWARA, KAZUKO, YONEDA, FUMIO

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1970

File:

PDF, 750 KB

1970

45

Dimethylamination and Formylation of Pyrimidines with Dimethylformamide

NISHIGAKI, SADAO, SENGA, KEITARO, YONEDA, FUMIO

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1971

Language:

english

File:

PDF, 722 KB

english, 1971

46

Intermolecular Dimethylamination and Formylation with Dimethylformamide

SENGA, KEITARO, YONEDA, FUMIO, NISHIGAKI, SADAO

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1971

File:

PDF, 362 KB

1971

47

The Novel Use of Diethyl Azodicarboxylate in a New Synthesis of 7-Azapteridine-N-oxides

YONEDA, FUMIO, NISHIGAKI, SADAO, SHINOMURA, KAZUKO

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1971

File:

PDF, 314 KB

1971

48

Oxidation of 5-Nitrosopyrimidines by Nitrous Acid. A Synthesis of 5-Nitropyrimidines

NISHIGAKI, SADAO, OGIWARA, KAZUKO, YONEDA, FUMIO

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1971

File:

PDF, 334 KB

1971

49

The Syntheses of Some Androstano [2, 3-g] pteridines

YONEDA, FUMIO, FUKAZAWA, SHINOBU, NISHIGAKI, SADAO

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1972

File:

PDF, 552 KB

1972

50

Syntheses and Properties of Some Pyrrolo [2, 3-d] pyrimidine Derivatives

YONEDA, FUMIO, HIGUCHI, MASATSUGU, SENGA, KEITARO, KANAHORI, MICHIKO, NISHIGAKI, SADAO

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1973

Language:

english

File:

PDF, 779 KB

english, 1973

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