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1

Ring opening reaction of N-substituted dihydropyrimidines with metal hydride complexes

Choji Kashima, Masao Shimizu, Akira Katoh, Yoshimori Omote

Journal:

Journal of Heterocyclic Chemistry

Year:

1984

File:

PDF, 236 KB

1984

2

Amino alcohols as C-terminal protecting groups in peptide synthesis

Kashima, Choji, Harada, Kazuo, Fujioka, Yoko, Maruyama, Tatsuya, Omote, Yoshimori

Journal:

Journal of the Chemical Society Perkin Transactions 1

Year:

1988

Language:

english

File:

PDF, 648 KB

english, 1988

3

Regiospecific synthesis of isoxazoles by the reaction of ?-bromoenones with hydroxylamine

Kashima, Choji, Shirai, Shun-Ichi, Yoshiwara, Nobutoshi, Omote, Yoshimori

Journal:

Journal of the Chemical Society Chemical Communications

Year:

1980

Language:

english

File:

PDF, 131 KB

english, 1980

4

Breaking the Symmetry of Axially Chiral N-Aryl-2(1H)-pyrimidinones by Spontaneous Crystallization

Masami Sakamoto, Noriyuki Utsumi, Masaru Ando, Mizuho Saeki, Takashi Mino, Tsutomu Fujita, Akira Katoh, Takehiko Nishio, Choji Kashima

Journal:

Angewandte Chemie

Year:

2003

Language:

english

File:

PDF, 120 KB

english, 2003

5

Breaking the Symmetry of Axially Chiral N-Aryl-2(1H)-pyrimidinones by Spontaneous Crystallization

Masami Sakamoto, Noriyuki Utsumi, Masaru Ando, Mizuho Saeki, Takashi Mino, Tsutomu Fujita, Akira Katoh, Takehiko Nishio, Choji Kashima

Journal:

Angewandte Chemie International Edition

Year:

2003

Language:

english

File:

PDF, 120 KB

english, 2003

6

ChemInform Abstract: New Facile Alkoxycarbonylating Agent, Alkyl Pyrazole-1-carboxylates. The Preparation and the Utilities.

Choji Kashima, Shiro Tsuruoka, Saori Mizuhara

Journal:

Year:

1999

File:

PDF, 32 KB

1999

7

ChemInform Abstract: A Convenient Preparation of α-Keto Esters by the Grignard Reaction on N-Acylpyrazoles.

Choji Kashima, Yoshie Shirahata, Yoshihiro Tsukamoto

Journal:

Year:

1999

File:

PDF, 31 KB

1999

8

ChemInform Abstract: New System for Peptide Synthesis Using N-Acylpyrazoles.

Choji Kashima, Shiro Tsuruoka, Saori Mizuhara

Journal:

Year:

2000

File:

PDF, 29 KB

2000

9

ChemInform Abstract: Asymmetric Borane Reduction of Ketones Catalyzed by N-Hydroxyalkyl-l-menthopyrazoles.

Choji Kashima, Yoshihiro Tsukamoto, Kohei Higashide, Hiroyuki Nakazono

Journal:

Year:

2001

File:

PDF, 29 KB

2001

10

ChemInform Abstract: Preparation of β-Substituted γ-Keto Esters by the Grignard Reaction on N-Acylpyrazoles.

Choji Kashima, Yoshie Shirahata, Yoshihiro Tsukamoto

Journal:

Year:

2001

File:

PDF, 35 KB

2001

11

ChemInform Abstract: Asymmetric Borane Reduction of Ketones Promoted by Menthopyrazole—ZnCl2 Complex.

Choji Kashima, Yoshihiro Tsukamoto, Yohei Miwa, Kohei Higashide

Journal:

Year:

2001

File:

PDF, 31 KB

2001

12

Asymmetric Reaction of Diethylzinc with Aldehydes Catalyzed by l-Menthopyrazole Derivatives.

Choji Kashima, Kohei Higashide, Yohei Miwa, Yoshihiro Tsukamoto

Journal:

Year:

2003

File:

PDF, 99 KB

2003

13

Synthetic Utilities of N-Acylpyrazoles

Journal:

Year:

2003

File:

PDF, 49 KB

2003

14

New Optically Active Pyrazoles: Syntheses and the Structural Characterization of Menthopyrazole Analogues.

Choji Kashima, Yohei Miwa, Saori Shibata, Hiroyuki Nakazono

Journal:

Year:

2003

File:

PDF, 188 KB

2003

15

3-Phenyl-l-menthopyrazole [(4R,7S)-7-Isopropyl-4-methyl-3-phenyl-4,5,6,7-tetrahydroindazole]: A New Type of Chiral Auxiliary

Journal:

Year:

2003

File:

PDF, 59 KB

2003

16

Asymmetric Diels—Alder Reaction Using Pyrazole Derivatives as a Chiral Catalyst.

Choji Kashima, Yohei Miwa, Saori Shibata, Hiroyuki Nakazono

Journal:

Year:

2004

File:

PDF, 151 KB

2004

17

Asymmetric Conjugate Addition Reaction Using Pyrazole Derivatives as a Chiral Catalyst.

Choji Kashima, Hiroyo Yokoyama, Saori Shibata, Kiyoshi Fujisawa, Takehiko Nishio

Journal:

Year:

2004

File:

PDF, 89 KB

2004

18

Preparation of 2,6-Bis(l-menthopyrazol-3-yl)pyridines and Their Catalytic Activity for Asymmetric Diels—Alder Reaction.

Choji Kashima, Saori Shibata, Hiroyo Yokoyama, Takehiko Nishio

Journal:

Year:

2004

File:

PDF, 104 KB

2004

19

Reduction of Indolin-2-ones and Desulfurization of Indoline-2-thiones to Indoline and Indole Derivatives

Takehiko Nishio, Norikazu Okuda, Choji Kashima

Journal:

Helvetica Chimica Acta

Year:

1990

Language:

english

File:

PDF, 312 KB

english, 1990

20

Synthesis of optically active β-lactams by the reaction of 2-acyl-3-phenyl-l-menthopyrazoles with CN compounds

Choji Kashima, Kiyoshi Fukusaka, Katsumi Takahashi

Journal:

Journal of Heterocyclic Chemistry

Year:

1997

File:

PDF, 500 KB

1997

21

Conjugate addition of grignard reagents to N-(α,β-unsaturated)acylpyrazoles. Diastereoselective β-alkylation using 3-phenyl-l-menthopyrazole

Choji Kashima, Katsumi Takahashi, Kiyoshi Fukusaka, Akira Hosomi

Journal:

Journal of Heterocyclic Chemistry

Year:

1998

File:

PDF, 649 KB

1998

22

Asymmetric borane reduction of ketones catalyzed by N-hydroxyalkyl-l-menthopyrazoles

Choji Kashima, Yoshihiro Tsukamoto, Kohei Higashide, Hiroyuki Nakazono

Journal:

Journal of Heterocyclic Chemistry

Year:

2000

File:

PDF, 607 KB

2000

23

Asymmetric borane reduction of ketones promoted by menthopyrazole-zncl2 complex

Choji Kashima, Yoshihiro Tsukamoto, Yohei Miwa, Kohei Higashide

Journal:

Journal of Heterocyclic Chemistry

Year:

2001

Language:

english

File:

PDF, 52 KB

english, 2001

24

Asymmetric reaction of diethylzinc with aldehydes catalyzed by l-menthopyrazole derivatives

Choji Kashima, Kohei Higashide, Yohei Miwa, Yoshihiro Tsukamoto

Journal:

Journal of Heterocyclic Chemistry

Year:

2002

Language:

english

File:

PDF, 80 KB

english, 2002

25

New optically active pyrazoles: Syntheses and the structural characterization of menthopyrazole analogues

Choji Kashima, Yohei Miwa, Saori Shibata, Hiroyuki Nakazono

Journal:

Journal of Heterocyclic Chemistry

Year:

2002

Language:

english

File:

PDF, 65 KB

english, 2002

26

Preparation of 2,6-bis(l-menthopyrzol-3-yl)pyridines and their catalytic activity for asymmetric diels alder reaction

Choji Kashima, Saori Shibata, Hiroyo Yokoyama, Takehiko Nishio

Journal:

Journal of Heterocyclic Chemistry

Year:

2003

Language:

english

File:

PDF, 96 KB

english, 2003

27

Asymmetric conjugate addition reaction using pyrazole derivatives as a chiral catalyst

Choji Kashima, Hiroyo Yokoyama, Saori Shibata, Kiyoshi Fujisawa, Takehiko Nishio

Journal:

Journal of Heterocyclic Chemistry

Year:

2003

Language:

english

File:

PDF, 27 KB

english, 2003

28

Asymmetric diels alder reaction using pyrazole derivatives as a chiral catalyst

Choji Kashima, Yohei Miwa, Saori Shibata, Hiroyuki Nakazono

Journal:

Journal of Heterocyclic Chemistry

Year:

2003

Language:

english

File:

PDF, 79 KB

english, 2003

29

Photochemical Reactions of 1-Alkyl-4,6-diaryl-2(1H)-pyrimidinones in the Presence of Amines

Takehiko Nishio, Michiyo Kato, Choji Kashima

Journal:

European Journal of Organic Chemistry

Year:

1989

Language:

english

File:

PDF, 515 KB

english, 1989

30

Intramolecular [2 + 2] Photocycloaddition of 2-Allylindane-1-thiones

Takehiko Nishio, Norikazu Okuda, Choji Kashima

Journal:

European Journal of Organic Chemistry

Year:

1996

Language:

english

File:

PDF, 470 KB

english, 1996

31

New facile alkoxycarbonylating agent, alkyl pyrazole-1-carboxylates. The preparation and the utilities

Choji Kashima, Shiro Tsuruoka, Saori Mizuhara

Journal:

Year:

1998

Language:

english

File:

PDF, 475 KB

english, 1998

32

Stereoselective N-acylation of a new chiral auxiliary compound; 3-phenyl-l-menthopyrazole

Choji Kashima, Iwao Fukuchi, Katsumi Takahashi, Akira Hosomi

Journal:

Tetrahedron Letters

Year:

1993

Language:

english

File:

PDF, 254 KB

english, 1993

33

Independent synthesis of three types of n-substituted dihydropyrimidines and their reactions with malachite green

Choji Kashima, Masao Shimizu, Akira Katoh, Yoshimori Omote

Journal:

Tetrahedron Letters

Year:

1983

Language:

english

File:

PDF, 204 KB

english, 1983

34

The convenient and one-pot synthesis of N-substituted carbazoles

Choji Kashima, Shigeki Hibi, Tatsuya Maruyama, Yoshimori Omote

Journal:

Tetrahedron Letters

Year:

1986

Language:

english

File:

PDF, 214 KB

english, 1986

35

Alkylation of aminohydroxy anion, dissociated species of hydroxylamine

Choji Kashima, Nobutoshi Yoshiwara, Yoshimori Omote

Journal:

Tetrahedron Letters

Year:

1982

Language:

english

File:

PDF, 103 KB

english, 1982

36

Formylation reaction using the ozonolysate of oxazole

Choji Kashima, Hideki Arao, Shigeki Hibi, Yoshimori Omote

Journal:

Tetrahedron Letters

Year:

1989

Language:

english

File:

PDF, 151 KB

english, 1989

37

The tautomeric study in 2-substituted 1,6-dihydro-4,6,6-trimethyl- pyrimidine systems

Choji Kashima, Masao Shimizu, Yoshimori Omote

Journal:

Tetrahedron Letters

Year:

1985

Language:

english

File:

PDF, 204 KB

english, 1985

38

Trapping of dopachrome with 2,3-dihydro-1H-cyclopent[b]indole

Yoshimori Omote, Atsushi Tomotake, Choji Kashima

Journal:

Tetrahedron Letters

Year:

1984

Language:

english

File:

PDF, 128 KB

english, 1984

39

Photochemistry of 1-substituted-4,6-dimethyl-2(1H)-pyrimidin-2-ones: Synthesis of 2-oxo-1,3-diazabicyclo[2,2,0]hex-5-enes

Takehiko Nishio, Akira Katoh, Yoshimori Omote, Choji Kashima

Journal:

Tetrahedron Letters

Year:

1978

Language:

english

File:

PDF, 115 KB

english, 1978

40

Resolution of secondary alcohols using 2-acyl-3-phenyl-l-menthopyrazoles as enantioselective acylating agents

Choji Kashima, Saori Mizuhara, Yohei Miwa, Yukihiro Yokoyama

Journal:

Tetrahedron: Asymmetry

Year:

2002

Language:

english

File:

PDF, 232 KB

english, 2002

41

NMR studies on the restricted rotation of 1-[2-(1-phenyl) propyl]-2,5-dimethylpyrrole derivatives

Choji Kashima, Tatsuya Maruyama, Yoko Fujioka, Kazuo Harada

Journal:

Journal of Physical Organic Chemistry

Year:

1988

Language:

english

File:

PDF, 286 KB

english, 1988

42

Enantiomerically enriched preparation of enolizable β-keto amides. Diastereoselective α-acylation and subsequent aminolysis of 2-acyl-3-phenyl-l-menthopyrazoles

Choji Kashima, Iwao Fukuchi, Katsumi Takahashi, Akira Hosomi

Journal:

Year:

1996

Language:

english

File:

PDF, 586 KB

english, 1996

43

Photochemistry of N-aryl-2(1H)-pyrimidin-2-ones

Takehiko Nishio, Katsuhiro Katahira, Akira Kato, Choji Kashima, Yoshimori Omote

Journal:

Tetrahedron Letters

Year:

1979

Language:

english

File:

PDF, 114 KB

english, 1979

44

Synthesis of .beta.-keto esters by the Reformatsky reaction of 3-acyloxazolidin-2-ones and -thiazolidine-2-thiones

Kashima, Choji, Huang, Xin Cheng, Harada, Yukari, Hosomi, Akira

Journal:

Journal of Organic Chemistry

Year:

1993

Language:

english

File:

PDF, 219 KB

english, 1993

45

The selective preparation of 1,4-diaryl-6-methyl- and 1,6-diaryl-4-methyl-2-(1H)pyrimidinones

Choji Kashima, Akira Katoh

Journal:

Journal of Heterocyclic Chemistry

Year:

1980

File:

PDF, 153 KB

1980

46

The reaction of β-amino conjugated enones with trimethylchlorosilane

Choji Kashima, Yasuhiro Yamamoto

Journal:

Journal of Heterocyclic Chemistry

Year:

1980

File:

PDF, 174 KB

1980

47

Ring opening reaction of 3,6-Dihydro-2-(1H)pyrimidinones with hydroxylamine hydrochloride

Choji Kashima, Akira Katoh, Yuko Yokota, Yoshimari Omote

Journal:

Journal of Heterocyclic Chemistry

Year:

1981

Language:

english

File:

PDF, 142 KB

english, 1981

48

Preparation of N-aryl-2,4-diaminopentanes by the ring opening reaction of 1-aryl-3,4,5,6-tetrahydro-2-(1H)pyrimidinones

Choji Kashima, Akira Katoh, Nobutoshi Yoshiwara, Yoshimori Omote

Journal:

Journal of Heterocyclic Chemistry

Year:

1981

Language:

english

File:

PDF, 191 KB

english, 1981

49

Regioselective synthesis of 3-hydroxyisoxazoles and 5-isoxazolones from β-amino α,β-unsaturated esters

Choji Kashima, Yumiko Konno, Nobutoshi Yoshiwara, Tadakuni Tajima

Journal:

Journal of Heterocyclic Chemistry

Year:

1982

File:

PDF, 152 KB

1982

50

1,3-dipolar cycloaddition of methyl 3-(1-imidazolyl)acrylate and related compounds

Choji Kashima, Atsushi Tsuzuki, Tadakuni Tajima

Journal:

Journal of Heterocyclic Chemistry

Year:

1984

File:

PDF, 214 KB

1984

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