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1

Asymmetric synthesis of the carbapenem antibiotic (+)-PS-5

Shibasaki, Masakatsu, Ishida, Yasuko, Iwasaki, Genji, Iimori, Takamasa

Journal:

Journal of Organic Chemistry

Year:

1987

Language:

english

File:

PDF, 289 KB

english, 1987

2

Regioselective acetylation of 7-deacetylforskolin with 11C-acetyl chloride

Toru Sasaki, Kohsuke Furukata, Shinichi Ishii, Takamasa Iimori, Shiro Ikegami, Tadashi Nozaki, Michio Senda

Journal:

Journal of Labelled Compounds and Radiopharmaceuticals

Year:

1996

Language:

english

File:

PDF, 415 KB

english, 1996

3

ChemInform Abstract: A Highly Stereoselective Construction of Glycosyl-β-(1→4)-galactoside Linkages by Reductive Cleavage of Cyclic Orthoesters.

Hiro Ohtake, Takamasa Iimori, Shiro Ikegami

Journal:

Year:

1999

File:

PDF, 32 KB

1999

4

ChemInform Abstract: An Efficient Synthesis of Mixed β-Carbonates of Acyl-Protected Sugar and Their Decarboxylative Glycosidation Promoted by Trimethylsilyl Trifluoromethanesulfonate.

Isao Azumaya, Toshihiro Niwa, Masaomi Kotani, Takamasa Iimori, Shiro Ikegami

Journal:

Year:

1999

File:

PDF, 33 KB

1999

5

2′-C-, 3′-C- and 5′-C-methylsangivamycins: conformational lock with the methyl group

Takamasa Iimori, Yasushi Murai, Shokichi Ohuchi, Yoshio Kodama, Yasuo Ohtsuka, Oishi Takeshi

Journal:

Tetrahedron Letters

Year:

1991

Language:

english

File:

PDF, 286 KB

english, 1991

6

Palladium chloride mediated rearrangement of 6-deoxyhex-5-enopyranosides into cyclohexanones

Takamasa Iimori, Hideyo Takahashi, Shiro Ikegami

Journal:

Tetrahedron Letters

Year:

1996

Language:

english

File:

PDF, 233 KB

english, 1996

7

A novel intramolecular decarboxylative glycosylation via mixed carbonate

Takamasa Iimori, Takafumi Shibazaki, Shiro Ikegami

Journal:

Tetrahedron Letters

Year:

1996

Language:

english

File:

PDF, 218 KB

english, 1996

8

Thrombomodulin induction in cultured human endothelial cells by 9-cis-locked retinoic acid analogues

Shiro Ikegami, Takamasa Iimori, Minoru Sudo, Maroka Kitsukawa, Alireza Foroumadi, Takeshi Yonemura, Hideyo Takahashi, Keiichiro Kizaki, Hidemi Ishii

Journal:

Bioorganic & Medicinal Chemistry

Year:

2006

Language:

english

File:

PDF, 251 KB

english, 2006

9

On the stereochemical course of vinyloxyborane—imine condensation -the stereoselective formation of threo β-amino acid derivatives-

Takamasa Iimori, Yasuko Ishida, Masakatsu Shibasaki

Journal:

Tetrahedron Letters

Year:

1986

Language:

english

File:

PDF, 287 KB

english, 1986

10

Simple, stereocontrolled synthesis of 1β-methylcarbapenem antibiotics from 3(R)-hydroxybutyric acid

Takamasa Iimori, Masakatsu Shibasaki

Journal:

Tetrahedron Letters

Year:

1986

Language:

english

File:

PDF, 292 KB

english, 1986

11

Stereocontrolled synthesis of (+)-thienamycin from 3(R)-hydroxybutyric acid

Takamasa Iimori, Masakatsu Shibasaki

Journal:

Tetrahedron Letters

Year:

1985

Language:

english

File:

PDF, 265 KB

english, 1985

12

Stereospecific synthesis of exo-allylic alcohol. An efficient asymmetric synthesis of (R)-(-)-2-acetyl-5,8-dimethoxy-1,2,3,4-tetrahydro-2-naphthols

Mikiko Sodeoka, Takamasa Iimori, Masakatsu Shibasaki

Journal:

Tetrahedron Letters

Year:

1985

Language:

english

File:

PDF, 264 KB

english, 1985

13

Creation of novel chiral synthons with enzymes and applications to natural product synthesis. 15. Efficient introduction of chiral centers into cyclohexane ring

Susumu Kobayashi, Keiji Kamiyama, Takamasa Iimori, Masaji Ohno

Journal:

Tetrahedron Letters

Year:

1984

Language:

english

File:

PDF, 266 KB

english, 1984

14

Carbon-carbon bond formation from ethyl cyanoformate and active methylene compounds

Takamasa Iimori, Yasushi Nii, Toshio Izawa, Susumu Kobayashi, Masaji Ohno

Journal:

Tetrahedron Letters

Year:

1979

Language:

english

File:

PDF, 230 KB

english, 1979

15

Enantioselective Complexation with a Conformationally Homogeneous C2 Podand Ionophore

Takamasa Iimori, Shawn D. Erickson, Arnold L. Rheingold, W.Clark Still

Journal:

Tetrahedron Letters

Year:

1989

Language:

english

File:

PDF, 288 KB

english, 1989

16

A highly stereoselective β-(1→4)-glycosidic bond formation by reductive cleavage of cyclic orthoesters

Takamasa Iimori, Hiro Ohtake, Shiro Ikegami

Journal:

Tetrahedron Letters

Year:

1997

Language:

english

File:

PDF, 230 KB

english, 1997

17

A facile and improved preparation of glycosylidene acetals of monosaccharides

Hiro Ohtake, Takamasa Iimori, Shiro Ikegami

Journal:

Tetrahedron Letters

Year:

1997

Language:

english

File:

PDF, 117 KB

english, 1997

18

An efficient synthesis of mixed β-carbonates of acyl-protected sugar and their decarboxylative glycosidation promoted by trimethylsilyl trifluoromethanesulfonate

Isao Azumaya, Toshihiro Niwa, Masaomi Kotani, Takamasa Iimori, Shiro Ikegami

Journal:

Tetrahedron Letters

Year:

1999

Language:

english

File:

PDF, 304 KB

english, 1999

19

Manzamine C congeners with modified azacyclic rings: Synthesis and biological evaluation

Yasuhiro Torisawa, Akihiro Hashimoto, Miwa Okouchi, Takamasa Iimori, Mieko Nagasawa, Tohru Hino, Masako Nakagawa

Journal:

Bioorganic & Medicinal Chemistry Letters

Year:

1996

Language:

english

File:

PDF, 273 KB

english, 1996

20

An efficient synthesis of cyclophellitol utilizing unusual regioselectivity of oxirane ring opening with Mes2BCH2Li

Hideyo Takahashi, Takamasa Iimori, Shiro Ikegami

Journal:

Tetrahedron Letters

Year:

1998

Language:

english

File:

PDF, 227 KB

english, 1998

21

Ph3P-(PyS)2-CH3CN as an excellent condensing system for .beta.-lactam formation from .beta.-amino acids

Kobayashi, Susumu, Iimori, Takamasa, Izawa, Toshio, Ohno, Masaji

Journal:

Journal of the American Chemical Society

Year:

1981

Language:

english

File:

PDF, 433 KB

english, 1981

22

Synthesis of (S)- and (R)-4[(methoxycarbonyl)methyl]-2-azetidinone by chemicoenzymic approach

Ohno, Masaji, Kobayashi, Susumu, Iimori, Takamasa, Wang, Yi-Fong, Izawa, Toshio

Journal:

Journal of the American Chemical Society

Year:

1981

Language:

english

File:

PDF, 302 KB

english, 1981

23

Enantioselective complexation of organic ammonium ions by simple tetracyclic podand ionophores

Wang, Xuebao, Erickson, Shawn D., Iimori, Takamasa, Still, W. Clark

Journal:

Journal of the American Chemical Society

Year:

1992

Language:

english

File:

PDF, 2.71 MB

english, 1992

24

Podand ionophores. A new class of nonmacrocyclic yet preorganized hosts for cations

Iimori, Takamasa, Still, W. Clark, Rheingold, Arnold L., Staley, Donna L.

Journal:

Journal of the American Chemical Society

Year:

1989

Language:

english

File:

PDF, 282 KB

english, 1989

25

Synthetic studies of azadirachtin. Synthesis of the cyclic acetal intermediate in the naturally occurring form

Nishikimi, Yuji, Iimori, Takamasa, Sodeoka, Mikiko, Shibasaki, Masakatsu

Journal:

Journal of Organic Chemistry

Year:

1989

Language:

english

File:

PDF, 875 KB

english, 1989

26

Conformational rigidity of specific pyrimidine residues in tRNA arises from posttranscriptional modifications that enhance steric interaction between the base and the 2'-hydroxyl group

Kawai, Gota, Yamamoto, Yuriko, Kamimura, Takashi, Masegi, Tsukio, Sekine, Mitsuo, Hata, Tsujiaki, Iimori, Takamasa, Watanabe, Tatsuo, Miyazawa, Tatsuo, Yokoyama, Shigeyuki

Journal:

Year:

1992

Language:

english

File:

PDF, 798 KB

english, 1992

27

Stereocontrolled synthesis of a cis-carbapenem antibiotic (-)-carpetimycin A

Iimori, Takamasa, Takahashi, Yoshio, Izawa, Toshio, Kobayashi, Susumu, Ohno, Masaji

Journal:

Journal of the American Chemical Society

Year:

1983

Language:

english

File:

PDF, 289 KB

english, 1983

28

An a-Selective Glycosylation via Decarboxylation of Mixed Carbonate Catalyzed by the Combination of Lewis Acid and Silver Perchlorate

Ikegami, Shiro, Iimori, Takamasa, Azumaya, Isao, Shibazaki, Takafumi

Journal:

Year:

1997

Language:

english

File:

PDF, 126 KB

english, 1997

29

Stereocontrolled synthesis of exocyclic olefins using arene tricarbonyl chromium complex-catalyzed hydrogenation. II. A catalytic asymmetric synthesis of an anthracycline intermediate.

SODEOKA, Mikiko, IIMORI, Takamasa, SHIBASAKI, Masakatsu

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1991

File:

PDF, 868 KB

1991

30

Medium-Membered Ring Ketone Synthesis. Synthesis of Oxa- and Aza-crclooctanone Derivatives.

OHTSUKA, Yasuo, FUSHIHARA, Kenichi, KOBAYASHI, Shogo, KAWAMURA, Ken-ichi, IIMORI, Takamasa, OISHI, Takeshi

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1992

File:

PDF, 1.24 MB

1992

31

2'- and 3'-Substituted Sangivamycins. Conformational Restriction by the Gauche Effect.

IIMORI, Takamasa, MURAI, Yasushi, WAKIZAWA, Yasuhiro, OHTSUKA, Yasuo, OHUCHI, Shokichi, KODAMA, Yoshio, OISHI, Takeshi

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1993

File:

PDF, 488 KB

1993

32

A Practical Preparation of Optically Active endo-Bicyclo(3.3.0)octen-2-ols.

IIMORI, Takamasa, AZUMAYA, Isao, HAYASHI, Yasuo, IKEGAMI, Shiro

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1997

File:

PDF, 467 KB

1997

33

Synthetic studies on an antitumor antibiotic, bleomycin. XII. Preparation of an L-2,3-diaminopropionic acid derivative as a synthetic intermediate.

OTSUKA, MASAMI, KITTAKA, ATSUSHI, IIMORI, TAKAMASA, YAMASHITA, HARUO, KOBAYASHI, SUSUMU, OHNO, MASAJI

Journal:

CHEMICAL & PHARMACEUTICAL BULLETIN

Year:

1985

File:

PDF, 618 KB

1985

34

A Mild and Rapid Glycosylation Reaction between Pyrimidine Bases and 2-Deoxyrobofuranosyl N,N,N',N'-Tetramethylphosphoroamidates

Ikegami, Shiro, Iimori, Takamasa, Kobayashi, Hiroshi, Hashimoto, Shun-ichi

Journal:

Year:

1996

Language:

english

File:

PDF, 118 KB

english, 1996

35

Asymmetric hydrolysis of prochiral dimethyl 3-benzyloxycarbonylaminoglutarate with microorganisms. Preparation of (S)-3-amino-4-methoxycarbonylbutyric acid for the synthesis of carbapenem and negamycin antibiotics.

KOTANI, Hirokazu, KUZE, Yukari, UCHIDA, Satoko, MIYABE, Toshinori, IIMORI, Takamasa, OKANO, Kazuo, KOBAYASHI, Susumu, OHNO, Masaji

Journal:

Agricultural and Biological Chemistry

Year:

1983

Language:

english

File:

PDF, 377 KB

english, 1983

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