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1

Synthesis of (24R)-28-homobrassinolide analogues and structure-activity relationships of brassinosteroids in the rice-lamina inclination test

Suguru Takatsuto, Naoto Yazawa, Nobuo Ikekawa, Tadashi Morishita, Hiroshi Abe

Journal:

Year:

1983

Language:

english

File:

PDF, 443 KB

english, 1983

2

Support of embryonic chick survival by vitamin D metabolites

Syed Ameenuddin, Milton L. Sunde, Hector F. DeLuca, Nobuo Ikekawa, Yoshioro Kobayashi

Journal:

Archives of Biochemistry and Biophysics

Year:

1983

Language:

english

File:

PDF, 359 KB

english, 1983

3

Synthesis of (22R,23R)-28-homobrassinolide.

TAKATSUTO, SUGURU, IKEKAWA, NOBUO

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1982

File:

PDF, 668 KB

1982

4

Application of [Mo2(OAc)4] for determination of absolute configuration of brassinosteroid vic-diols by circular dichroism

Jadwiga Frelek, Nobuo Ikekawa, Suguru Takatsuto, (The Late) Günther Snatzke

Journal:

Year:

1997

Language:

english

File:

PDF, 109 KB

english, 1997

5

ChemInform Abstract: Studies on the Biosynthesis of Sterol Side Chain in Higher Plants

Yoshinori Fujimoto, Masuo Morisaki, Nobuo Ikekawa

Journal:

Year:

2001

File:

PDF, 25 KB

2001

6

Formal Synthesis of Squalamine from Desmosterol.

Kazuo Okumura, Yutaka Nakamura, Seiji Takeuchi, Isao Kato, Yoshinori Fujimoto, Nobuo Ikekawa

Journal:

Year:

2004

File:

PDF, 142 KB

2004

7

Structures and biological activities of vitamin D metabolites and their analogs

Journal:

Medicinal Research Reviews

Year:

1987

Language:

english

File:

PDF, 2.19 MB

english, 1987

8

Effective separation of C-24 epimeric brassinosteroids by liquid chromatography

Keiji Gamoh, Suguru Takatsuto, Nobuo Ikekawa

Journal:

Analytica Chimica Acta

Year:

1992

Language:

english

File:

PDF, 332 KB

english, 1992

9

Gas chromatographic analysis of oxidation products of adrenal corticosteroids

Kyosuke Tsuda, Nobuo Ikekawa, Yoshihiro Sato, Reiko Watanuki

Journal:

Analytical Biochemistry

Year:

1966

Language:

english

File:

PDF, 319 KB

english, 1966

10

Determination of morphine in urine by gas chromatography

Nobuo Ikekawa, Kazuko Takayama, Eikichi Hosoya, Tetsuo Oka

Journal:

Analytical Biochemistry

Year:

1969

Language:

english

File:

PDF, 424 KB

english, 1969

11

12,15-Dihydroxylabda-8(17),13-Dien-19-OIC acid from Guizotia scabra

Yoshinori Fujimoto, Katsumi Kakinuma, Tadashi Eguchi, Nobuo Ikekawa, Noriaki Hirayama, Augustin Mbarushimana, Daniel Ntahomvukiye

Journal:

Year:

1990

Language:

english

File:

PDF, 258 KB

english, 1990

12

Synthesis and biological activities of 22-hydroxy and 22-methoxy derivatives of 1α,25-dihydroxyvitamin D3: Importance of side chain conformation for biological activities

Tadashi Eguchi, Mitsuzi Yoshida, Nobuo Ikekawa

Journal:

Bioorganic Chemistry

Year:

1989

Language:

english

File:

PDF, 900 KB

english, 1989

13

Conformational analysis of 1α,25-dihydroxyvitamin D3 by nuclear magnetic resonance

Tadashi Eguchi, Nobuo Ikekawa

Journal:

Bioorganic Chemistry

Year:

1990

Language:

english

File:

PDF, 634 KB

english, 1990

14

Chromatography in steroid research work

Journal:

TrAC Trends in Analytical Chemistry

Year:

1984

Language:

english

File:

PDF, 756 KB

english, 1984

15

Microanalysis of brassinolide and its analogues by gas chromatography and gas chromatography-mass spectrometry

Suguru Takatsuto, Baiping Ying, Masuo Morisaki, Nobuo Ikekawa

Journal:

Journal of Chromatography A

Year:

1982

Language:

english

File:

PDF, 444 KB

english, 1982

16

Effective separation of sterol C-24 epimers

Nobuo Ikekawa, Yoshinori Fujimoto, Shigetoshi Kadota, Tohru Kikuchi

Journal:

Journal of Chromatography A

Year:

1989

Language:

english

File:

PDF, 477 KB

english, 1989

17

Analysis of natural brassinosteroids by gas chromatography and gas chromatography—mass spectrometry

Nobuo Ikekawa, Suguru Takatsuto, Takaharu Kitsuwa, Hisahi Saito, Tadashi Morishita, Hiroshi Abe

Journal:

Journal of Chromatography A

Year:

1984

Language:

english

File:

PDF, 815 KB

english, 1984

18

Synthesis and biological activity of brassinolide analogues, 26,27-bisnorbrassinolide and its 6-oxo analogue

Suguru Takatsuto, Naoto Yazawa, Nobuo Ikekawa

Journal:

Year:

1984

Language:

english

File:

PDF, 438 KB

english, 1984

19

Sesquiterpene lactones from Gutenbergia cordifolia

Yoshinori Fujimoto, Takumi Kinoshita, Nobuo Ikekawa, Joseph Mungarulire

Journal:

Year:

1987

Language:

english

File:

PDF, 343 KB

english, 1987

20

Sterol profiles of red algae

Isabelle Chardon-Loriaux, Masuo Morisaki, Nobuo Ikekawa

Journal:

Year:

1976

Language:

english

File:

PDF, 338 KB

english, 1976

21

Synthesis of active forms of vitamin D VI synthesis of (24R)- and (24S)-24,25-dihydroxyvitamin D3

Masao Seki, Naoyuki Koizumi, Masuo Morisaki, Nobuo Ikekawa

Journal:

Tetrahedron Letters

Year:

1975

Language:

english

File:

PDF, 208 KB

english, 1975

22

Absolute configurations of 24-hydroxycholesterol and related compounds

Naoyuki Koizumi, Masuo Morisaki, Nobuo Ikekawa, Atsuo Suzuki, Toru Takeshita

Journal:

Tetrahedron Letters

Year:

1975

Language:

english

File:

PDF, 209 KB

english, 1975

23

Preparation of fluorine-modified 25-hydroxyvitamin D2: 28,28,28-trifluoro-, 26,26, 26,27,27,27-hexafluoro- and 28-nor-26,26,26,27,27,27-hexafluoro-25-hydroxyvitamin D2

Takeo Taguchi, Ryoichi Namba, Masakazu Nakazawa, Masaharu Nakajima, Yumiko Nakama, Yoshiro Kobayashi, Noriyuki Hara, Nobuo Ikekawa

Journal:

Tetrahedron Letters

Year:

1988

Language:

english

File:

PDF, 263 KB

english, 1988

24

Stereoselective synthesis of plant growth-promoting steroids, dolicholide and 28-norbrassinolide

Suguru Takatsuto, Nobuo Ikekawa

Journal:

Tetrahedron Letters

Year:

1983

Language:

english

File:

PDF, 223 KB

english, 1983

25

Stereoselective synthesis of withafein A and 27-deoxywithaferin A1

Masao Hirayama, Keiji Gamoh, Nobuo Ikekawa

Journal:

Tetrahedron Letters

Year:

1982

Language:

english

File:

PDF, 200 KB

english, 1982

26

Mechanism of campesterol demethylation in insect

Sanae Maruyama, Yoshinori Fujimoto, Masuo Morisaki, Nobuo Ikekawa

Journal:

Tetrahedron Letters

Year:

1982

Language:

english

File:

PDF, 264 KB

english, 1982

27

Photochemical reactions of pyrazine-N-oxides

Nobuo Ikekawa, Yasushi Honma, Rikagaku Kenkyusho

Journal:

Tetrahedron Letters

Year:

1967

Language:

english

File:

PDF, 204 KB

english, 1967

28

Exclusive γ-coupling in the aldol reaction of α,β-unsaturated esters

Akira Kajikawa, Masuo Morisaki, Nobuo Ikekawa

Journal:

Tetrahedron Letters

Year:

1975

Language:

english

File:

PDF, 110 KB

english, 1975

29

Stereocontrolled Synthesis of Petrosterol

Yoshinori Fujimoto, Mitsunori Ohhana, Takeshi Terasawa, Nobuo Ikekawa

Journal:

Tetrahedron Letters

Year:

1985

Language:

english

File:

PDF, 208 KB

english, 1985

30

Mechanism of stigmasterol dealkylation in insect

Yoshinori Fujimoto, Miki Kimura, Akihiro Takasu, Fathy A.M. Khalifa, Masuo Morisaki, Nobuo Ikekawa

Journal:

Tetrahedron Letters

Year:

1984

Language:

english

File:

PDF, 228 KB

english, 1984

31

Synthetic studies of withanolide I synthesis of ab ring moiety of withaferin A

Masaji Ishiguro, Akira Kajikawa, Toshio Haruyama, Masuo Morisaki, Nobuo Ikekawa

Journal:

Tetrahedron Letters

Year:

1974

Language:

english

File:

PDF, 183 KB

english, 1974

32

Total synthesis of the racemates of kaur-16-en-19-OL monogynol and some oxygenated kauranes

Kenji Mori, Masanao Matsui, Nobuo Ikekawa, Yusuke Sumiki

Journal:

Tetrahedron Letters

Year:

1966

Language:

english

File:

PDF, 273 KB

english, 1966

33

Synthesis of 26,26,26-trifluoro-25-hydroxy and 27-nor-26,26,26-trifluoro-25-hydroxyvitamin D3

Yoshiro Kobayashi, Takeo Taguchi, Norio Kanuma, Nobuo Ikekawa, Jun-ichi Oshida

Journal:

Tetrahedron Letters

Year:

1981

Language:

english

File:

PDF, 219 KB

english, 1981

34

Synthesis of 24,24-difluoro- and 24ξ-fluoro-25-hydroxyvitamin D3

Yoshiro Kobayashi, Takeo Taguchi, Tadafumi Terada, Jun-ichi Oshida, Masuo Morisaki, Nobuo Ikekawa

Journal:

Tetrahedron Letters

Year:

1979

Language:

english

File:

PDF, 231 KB

english, 1979

35

Stereocontrolled synthesis and determination of the c-24 and 25 stereochemistry of glaucasterol

Yoshinori Fujimoto, Miki Kimura, Takeshi Terasawa, Fathy A.M. Khalifa, Nobuo Ikekawa

Journal:

Tetrahedron Letters

Year:

1984

Language:

english

File:

PDF, 231 KB

english, 1984

36

Synthesis of 23,23-difluoro-25-hydroxyvitamin D3

Takeo Taguchi, Satoshi Mitsuhashi, Akiko Yamanouchi, Yoshiro Kobayashi, Hiroshi Sai, Nobuo Ikekawa

Journal:

Tetrahedron Letters

Year:

1984

Language:

english

File:

PDF, 211 KB

english, 1984

37

Migration of C-25 hydrogen of sitosterol to C-24 during the conversion into desmosterol in the silkworm Bombyx mori

Yoshinori Fujimoto, Norio Awata, Masuo Morisaki, Nobuo Ikekawa

Journal:

Tetrahedron Letters

Year:

1974

Language:

english

File:

PDF, 197 KB

english, 1974

38

Synthesis of [25R]- and [25S]-25,26-dihydroxyvitamin D3

Naoyuki Koizumi, Masuo Morisaki, Nobuo Ikekawa

Journal:

Tetrahedron Letters

Year:

1978

Language:

english

File:

PDF, 226 KB

english, 1978

39

Stereochemistry and physiological significance of hydroxylation of vitamin D side chain

Journal:

Bioorganic & Medicinal Chemistry Letters

Year:

1993

Language:

english

File:

PDF, 491 KB

english, 1993

40

Calcium regulating activity of 26,27-dialkyl analogs of 1α,25-dihydroxyvitamin D3

Tatsuro Miyahara, Masahiro Harada, Masaki Miyata, Akemi Sugure, Yumi Ikemoto, Tadanobu Takamura, Shohei Higuchi, Susumu Otomo, Hiroshi Kozuka, Nobuo Ikekawa

Journal:

Calcified Tissue International

Year:

1992

Language:

english

File:

PDF, 514 KB

english, 1992

41

Calcium regulating activity of 24a-homo-24,24-difluoro-1α,25-dihydroxyvitamin D3and 26,27-dimethyl-24,24-difluoro-1α,25-dihydroxyvitamin D3

Masahiro Harada, Tatsuro Miyahara, Masaki Miyata, Hiroko Komiyama, Akemi Sugure, Yumi Ikemoto, Sumiyo Kondo, Tadanobu Takamura, Shohei Higuchi, Susumu Otomo, Hiroshi Kozuka, Nobuo Ikekawa

Journal:

Calcified Tissue International

Year:

1993

Language:

english

File:

PDF, 592 KB

english, 1993

42

Lysis of platelets and erythrocytes by the incorporation of a unique oxygenated sterol: 22R-Hydroxycholesterol

Yuji Saito, Hiroshi Shimada, Teruaki Imada, Takashi Kikuchi, Nobuo Ikekawa, Yuji Inada

Journal:

Journal of Membrane Biology

Year:

1985

Language:

english

File:

PDF, 684 KB

english, 1985

43

Gas chromatographic separation of DNP amino acids and its application to the analysis of serum amino acids

Nobuo Ikekawa, Osamu Hoshino, Reiko Watanuki, Hajime Orimo, Takuo Fujita, Masaki Yoshikawa

Journal:

Analytical Biochemistry

Year:

1966

Language:

english

File:

PDF, 407 KB

english, 1966

44

Structure-activity relationship of brassinosteroids

Suguru Takatsuto, Naoto Yazawa, Nobuo Ikekawa, Tetsuo Takematsu, Yasutomo Takeuchi, Masami Koguchi

Journal:

Year:

1983

Language:

english

File:

PDF, 483 KB

english, 1983

45

Evidence for plant growth promoting brassinosteroids in leaves of Thea sinensis

Tadashi Morishita, Abe Hiroshi, Uchiyama Masaaki, Marumo Shingo, Takatsuto Suguru, Ikekawa Nobuo

Journal:

Year:

1983

Language:

english

File:

PDF, 284 KB

english, 1983

46

Separation of vitamin D3 metabolites and their analogues by high-pressure liquid chromatography

Nobuo Ikekawa, Naoyuki Koizumi

Journal:

Journal of Chromatography A

Year:

1976

Language:

english

File:

PDF, 426 KB

english, 1976

47

Synthesis of 2β-fluoro-1α-hydroxyvitamin D3

Jun-ichi Oshida, Masuo Morisaki, Nobuo Ikekawa

Journal:

Tetrahedron Letters

Year:

1980

Language:

english

File:

PDF, 148 KB

english, 1980

48

Remote substituent effect on the regioselectivity in the baeyer-villiger oxidation of 5α-cholestan-6-one derivatives

Suguru Takatsuto, Nobuo Ikekawa

Journal:

Tetrahedron Letters

Year:

1983

Language:

english

File:

PDF, 210 KB

english, 1983

49

Stereoselective synthesis of demethylgorgosterol

Masaji Ishiguro, Akira Akaiwa, Yoshinori Fujimoto, Susumu Sato, Nobuo Ikekawa

Journal:

Tetrahedron Letters

Year:

1979

Language:

english

File:

PDF, 229 KB

english, 1979

50

Stereochemistry of cholesterol hydroxylation at C-22 during pregnenolone biosynthesis

Carmenza Duque, Masuo Morisaki, Nobuo Ikekawa, Mikio Shikita

Journal:

Tetrahedron Letters

Year:

1979

Language:

english

File:

PDF, 219 KB

english, 1979

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