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1

A solvent effect on the side-chain conformation of phenylalanine derivatives and phenylalanine residuces in dipeptides

Jun'Ichi Kobayashi, Ukon Nagai

Journal:

Année:

1978

Langue:

english

Fichier:

PDF, 724 KB

english, 1978

2

CD spectral study of Dnp derivatives of amino acids and peptides for their configurational and conformational analysis

Masao Kawai, Ukon Nagai, Yoshihito Inai, Hatsuo Yamamura, Ryougo Akasaka, Shigeru Takagi, Yoshihisa Miwa, Tooru Taga

Journal:

Année:

2005

Langue:

english

Fichier:

PDF, 247 KB

english, 2005

3

Gramicidin S analogs with a D-Ala, Gly, or L-Ala residue in place of the D-Phe residue: Molecular conformations and interactions with phospholipid membrane

Tsutomu Higashijima, Tatsuo Miyazawa, Masao Kawai, Ukon Nagai

Journal:

Année:

1986

Langue:

english

Fichier:

PDF, 785 KB

english, 1986

4

Bicyclic turned dipeptide (BTD) as a β-turn mimetic; its design, synthesis and incorporation into bioactive peptides

Ukon Nagai, Kazuki Sato, Rika Nakamura, Rika Kato

Journal:

Année:

1993

Langue:

english

Fichier:

PDF, 979 KB

english, 1993

5

CD-spectra of N-2,4-dinitrophenyl(dnp) derivatives of aromatic amino acids: A simple method for determining their absolute configuration

Masao Kawai, Ukon Nagai, Motoko Katsumi

Journal:

Tetrahedron Letters

Année:

1975

Langue:

english

Fichier:

PDF, 152 KB

english, 1975

6

Synthesis of a bicyclic dipeptide with the shape of β-turn central part

Ukon Nagai, Kazuki Sato

Journal:

Tetrahedron Letters

Année:

1985

Langue:

english

Fichier:

PDF, 233 KB

english, 1985

7

A method for determining the chirality of diamino compounds: DI-DNP chipality rule

Masao Kawai, Ukon Nagai, Tsunetoshi Kobayashi

Journal:

Tetrahedron Letters

Année:

1974

Langue:

english

Fichier:

PDF, 205 KB

english, 1974

8

A new sensitive method for determining absolute configuration of α-amino acids: CD spectra of N-2,4-dinitrophenyl-α-amino acylanilides

Masao Kawai, Ukon Nagai

Journal:

Tetrahedron Letters

Année:

1977

Langue:

english

Fichier:

PDF, 123 KB

english, 1977

9

A method for determining absolute configuratiom of β-amino acids by CD spectra of their DNP derivatives

Ukon Nagai, Masao Kawai, Takashi Yamada, Shigeru Kuwata, Hiroshi Watanabe

Journal:

Tetrahedron Letters

Année:

1981

Langue:

english

Fichier:

PDF, 147 KB

english, 1981

10

Absolute configuration of an iturinic acid as determined by CD spectrum of its DNP-p-methoxyanilide

Ukon Nagai, Françoise Besson, Françoise Peypoux

Journal:

Tetrahedron Letters

Année:

1979

Langue:

english

Fichier:

PDF, 132 KB

english, 1979

11

A new sensitive method for determining absolute configuration of α-substituted cyclic imines by CD spectra of chromophoric derivatives

Ukon Nagai, Yoko Kani

Journal:

Tetrahedron Letters

Année:

1977

Langue:

english

Fichier:

PDF, 122 KB

english, 1977

12

Simultaneous synthesis of both diastereomers of stereoselectively β-deuterated phenylalanines: (2S,3R)- and (2R,3R)-PhCHDCH(NH2)COOH

Ukon Nagai, Jun'ichi Kobayashi

Journal:

Tetrahedron Letters

Année:

1976

Langue:

english

Fichier:

PDF, 155 KB

english, 1976

13

Studies on β-turn of peptides : IX. Effect of 1st and 4th amino acids of tetrapeptide sequences on their β-turn preferences studied by CD spectra of their chromophoric derivatives*

KAZUKI SATO, RIKA SUGAWARA, UKON NAGAI

Journal:

Chemical Biology & Drug Design

Année:

1984

Langue:

english

Fichier:

PDF, 383 KB

english, 1984

14

Studies on β-turn of peptides : X. Effect of the chirality of 1st and 4th amino acids of tetrapeptide sequences on their β-turn preferences studied by conformational energy calculation*

MASAO KAWAI, KAZUKI SATO, UKON NAGAI

Journal:

Chemical Biology & Drug Design

Année:

1984

Langue:

english

Fichier:

PDF, 332 KB

english, 1984

15

Solid phase synthesis of human growth hormone-releasing factor analogs containing a bicyclic β-turn dipeptide

KAZUKI SATO, MARI HOTTA, MING-HUI DONG, HSIAO-YU HU, JOSEPH P. TAULENE, MURRAY GOODMAN, UKON NAGAI, NICHOLAS LING

Journal:

Chemical Biology & Drug Design

Année:

1991

Langue:

english

Fichier:

PDF, 522 KB

english, 1991

16

Nuclear-Magnetic-Resonance Study on Met-enkephalin and Met-enkephalin : Molecular Association and Conformation

Tsutomu HIGASHIJIMA, Junichi KOBAYASHI, Ukon NAGAI, Tatsuo MIYAZAWA

Journal:

Année:

1979

Langue:

english

Fichier:

PDF, 1.23 MB

english, 1979

17

Structure-activity relationship of gramicidin S analogues on membrane permeability

Takashi Katsu, Hideki Kobayashi, Takashi Hirota, Yuzaburo Fujita, Kazuki Sato, Ukon Nagai

Journal:

Biochimica et Biophysica Acta (BBA) - Biomembranes

Année:

1987

Langue:

english

Fichier:

PDF, 975 KB

english, 1987

18

Upon DNP-aromatic Rule. Effect of Chromophore Exchange on the CD Spectra of N -DNP-arylalkylamines

Kawai, Masao, Nagai, Ukon

Journal:

Bulletin of the Chemical Society of Japan

Année:

1982

Fichier:

PDF, 380 KB

1982

19

Studies on the β-Turn of Peptides. VIII. β-Turn Preferences of N -Acetyltetrapeptide Methylamides Related to the β-Turn Part of Gramicidin S

Sato, Kazuki, Higashijima, Tsutomu, Sugawara, Rika, Nagai, Ukon

Journal:

Bulletin of the Chemical Society of Japan

Année:

1983

Fichier:

PDF, 636 KB

1983

20

Possible Interpretation of Inactivity of Novel Gramicidin S Analogs by CD Spectral Analysis of Tetrapeptide Derivatives Related to the Analogs

Sato, Kazuki, Nagai, Ukon, Tamaki, Makoto

Journal:

Bulletin of the Chemical Society of Japan

Année:

1985

Fichier:

PDF, 312 KB

1985

21

Studies on the β-Turn of Peptides. III. Syntheses and Conformational Properties of N -(2,4-Dinitrophenyl)tetrapeptide p -Nitroanilides Related to β-Turn Preferring Sequences in Proteins

Sato, Kazuki, Nagai, Ukon, Higashijima, Tsutomu

Journal:

Bulletin of the Chemical Society of Japan

Année:

1983

Fichier:

PDF, 632 KB

1983

22

Upon DNP-aromatic Rule. Effect of Introducing a Methyl Group to the β-Position upon the CD Spectra of DNP Derivatives of Aromatic α-Amino Acids

Kawai, Masao, Nagai, Ukon, Tanaka, Atsuko

Journal:

Bulletin of the Chemical Society of Japan

Année:

1982

Fichier:

PDF, 431 KB

1982

23

Studies on the β-Turn of Peptides. VI. Nuclear Magnetic Resonance Study on the Conformations of N -(2,4-Dinitrophenyl)tetrapeptide p -Nitroanilides Related to the β-Turn Part of Gramicidin S

Higashijima, Tsutomu, Sato, Kazuki, Nagai, Ukon

Journal:

Bulletin of the Chemical Society of Japan

Année:

1983

Fichier:

PDF, 879 KB

1983

24

Studies on the β-Turn of Peptides. VII. Syntheses and Antibiotic Activities of Gramicidin S Analogs with L-Pro-L-Asn or L-Pro-D-Ala Sequence at the β-Turn Part

Sato, Kazuki, Nagai, Ukon

Journal:

Bulletin of the Chemical Society of Japan

Année:

1983

Fichier:

PDF, 1.54 MB

1983

25

Studies on the β-Turn of Peptides. II. Syntheses and Conformational Properties of N -(2,4-Dinitrophenyl)tetrapeptide p -Nitroanilides Related to the β-Turn Part of Gramicidin S

Sato, Kazuki, Kawai, Masao, Nagai, Ukon

Journal:

Bulletin of the Chemical Society of Japan

Année:

1983

Fichier:

PDF, 809 KB

1983

26

Studies on the β-Turn of Peptides. V. Turn Preference of Peptide Sequence Analyzed by Conformational Energy Calculation on Dipeptide Models and by CD Spectra of Chromophoric Derivatives

Kawai, Masao, Sato, Kazuki, Sugawara, Rika, Nagai, Ukon

Journal:

Bulletin of the Chemical Society of Japan

Année:

1983

Fichier:

PDF, 654 KB

1983

27

Studies on β-Turn of Peptides. XII. Synthetic Confirmation of Weak Activity of [D-Pro 5,5′ ]-Gramicidin S Predicted from β-Turn Preference of Its Partial Sequence

Sato, Kazuki, Kato, Rika, Nagai, Ukon

Journal:

Bulletin of the Chemical Society of Japan

Année:

1986

Fichier:

PDF, 497 KB

1986

28

Studies on the β-Turn of Peptides. IV. Effect of the Chain Length on the CD Spectra of N -(2,4-Dinitrophenyl)-(Gly) n –D-Ala–L-Pro–(Gly) n p -Nitroanilides ( n =1–3)

Sato, Kazuki, Taki, Noriko, Nagai, Ukon, Higashijima, Tsutomu

Journal:

Bulletin of the Chemical Society of Japan

Année:

1983

Fichier:

PDF, 742 KB

1983

29

A Method for Determining Absolute Configuration of Cycloalkanamines and Related Compounds by CD Spectra of Their 2,4-Dinitrophenyl Derivatives

Kawai, Masao, Iwase, Teruhiko, Butsugan, Yasuo, Nagai, Ukon

Journal:

Bulletin of the Chemical Society of Japan

Année:

1985

Fichier:

PDF, 861 KB

1985

30

Design and Synthesis of Gramicidin S Analogs with High Antibiotic Activity

Sato, Kazuki, Yamaguchi, Yoko, Nagai, Ukon

Journal:

Bulletin of the Chemical Society of Japan

Année:

2013

Langue:

english

Fichier:

PDF, 664 KB

english, 2013

31

CONFORMATIONS ANALYSIS OF SOME CYCLIC PEPTIDES USING DIFFERENTIAL N-METHYLATION

Kawai, Masao, Nagai, Ukon

Journal:

Chemistry Letters

Année:

1977

Langue:

english

Fichier:

PDF, 3.73 MB

english, 1977

32

Studies on the Constituents of Umbelliferae Plants. III. Structure of Ligustilide.

Mitsuhashi, Hiroshi, Nagai, Ukon, Muramatsu, Toshio

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Année:

1961

Fichier:

PDF, 551 KB

1961

33

Studies on the Constituents of Umbelliferae Plants. VIII. Distribution of Alkylphthalides in Umbelliferae Plants.

Mitsuhashi, Hiroshi, Muramatsu, Toshio, Nagai, Ukon, Nakano, Toshio, Ueno, Koji

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Année:

1963

Fichier:

PDF, 425 KB

1963

34

Studies on Constituents of Fritillaria camtschatcensis KER-GAWLER

MITSUHASHI, HIROSHI, NAGAI, UKON, ENDO, TOHRU

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Année:

1969

Fichier:

PDF, 578 KB

1969

35

Optical Rotatory Dispersion of Nitrobenzene Derivatives. II. N-o-Nitrobenzoyl L-α-Amino Acids

NAGAI, UKON, KURUMI, MASATERU

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Année:

1970

Fichier:

PDF, 535 KB

1970

36

Optical rotatory dispersion of nitrobenzene derivatives. VII. Application of modified curtis rearrangement for determining the free carboxylic position in some partial esters of 3-nitro-phthalic and 4-nitrohemimellitic acid.

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Année:

1975

Fichier:

PDF, 605 KB

1975

37

Studies on the Constituents of Umbelliferae Plants. II. Isolation of the Active Principles of Ligusticum Root

Mitsuhashi, Hiroshi, Nagai, Ukon, Muramatsu, Toshio, Tashiro, Hatsue

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Année:

1960

Fichier:

PDF, 419 KB

1960

38

Crystal structure of a .BETA.-turn model dipeptide, (3S, 6S, 9R)-2-oxo-3-t-butyloxycarboxylamino-7-thia-1-aza-bicyclo(4.3.0)nonane-9-carboxylic acid.

OSANO, Yasuko T., MATSUZAKI, Takao, NAGAI, Ukon

Journal:

Analytical Sciences

Année:

1989

Langue:

english

Fichier:

PDF, 60 KB

english, 1989

39

Chiroptical properties of the N-2,4-dinitrophenyl(Dnp)-derivatives of unsaturated .ALPHA.-amino acids: Extension of the Dnp-aromatic rule.

NAGAI, UKON, TAKI, NORIKO, KAWAI, MASAO

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Année:

1981

Fichier:

PDF, 406 KB

1981

40

Automatic Extraction Unit for Alkaloids by Ion Exchange Resins

Okamoto, Toshihiko, Tani, Hidewo, Nagai, Ukon, Sakai, Shin-ichiro, Sugasawa, Tsutomu, Fujisawa, Keigo

Journal:

YAKUGAKU ZASSHI

Année:

1954

Fichier:

PDF, 433 KB

1954

41

Extraction and Purification of β-Sitosterol from Ligusticum Root

Mitsuhashi, Hiroshi, Muramatsu, Toshio, Nagai, Ukon

Journal:

YAKUGAKU ZASSHI

Année:

1958

Fichier:

PDF, 311 KB

1958

42

Aconite Alkaloids. XIII

Ochiai, Eiji, Okamoto, Toshihiko, Sakai, Shin-ichiro, Kaneko, Masahide, Fujisawa, Keigo, Nagai, Ukon, Tani, Hideo

Journal:

YAKUGAKU ZASSHI

Année:

1956

Fichier:

PDF, 750 KB

1956

43

Isolation of Myristicin from Ligusticum scoticum. L

Mitsuhashi, Hiroshi, Muramatsu, Toshio, Nagai, Ukon, Nishi, Ikuko

Journal:

YAKUGAKU ZASSHI

Année:

1959

Fichier:

PDF, 566 KB

1959

44

Studies on the Constituents of Umbelliferae Plants. IV

Mitsuhashi, Hiroshi, Nomura, Taro, Nagai, Ukon, Muramatsu, Toshio, Tokuda, Ikumi

Journal:

YAKUGAKU ZASSHI

Année:

1961

Fichier:

PDF, 417 KB

1961

45

Biological activity and conformation of peptides. Aiming at stereochemical molecular design.

Journal:

KAGAKU TO SEIBUTSU

Année:

1986

Fichier:

PDF, 455 KB

1986

46

Aconite Alkaloids. XV

Ochiai, Eiji, Okamoto, Toshihiko, Fujisawa, Keigo, Sugasawa, Tsutomu, Sakai, Shin-ichiro, Saito, Atsushi, Kaneko, Masahide, Nagai, Ukon

Journal:

YAKUGAKU ZASSHI

Année:

1956

Fichier:

PDF, 529 KB

1956