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6 results on '"Tatsuhiro Hamada"'

1. Synthesis and herbicidal activity of some 2,4-diarylpyrimidines

Author

Shinichi Kawamura, Yuzuru Sanemitsu, Tatsuhiro Hamada, Masaharu Sakaki, and Sato Junichi

Subjects
Trifluoromethyl, Pyrimidine, Stereochemistry, Aryl, Biological activity, General Chemistry, Chemical synthesis, chemistry.chemical_compound, Meta, chemistry, mental disorders, Moiety, General Agricultural and Biological Sciences, psychological phenomena and processes, Diarylpyrimidines
Abstract

A novel series of substituted 2,4-diarylpyrimidines was synthesized and found to possess bleaching herbicidal activity. These diarylpyrimidines, which incorporate a pyrimidine nucleus substituted by two aryl moieties, are new chemical families of bleaching herbicides. The structure-activity relationships were probed by substitution of the pyrimidine and/or aryl groups. Highest activity was seen with compounds that contain three sustituent: a trifluoromethyl group at a meta position of an aryl moiety at the pyrimidine 4-position, a fluorine or trifluoromethyl group at the para position of the other at the 2-position, and a methoxy group at the 5-position

Published
1993

2. Inhibition of carotenoid biosynthesis by interaction of 2,6-diphenylpyridine derivatives with phytoene desaturation

Author

Peter. Babczinski, Tatsuhiro Hamada, Ryo Sato, Shinichi Kawamura, Yuzuru Sanemitsu, Ullrich. Heinemann, and Gerhard Sandmann

Subjects
chemistry.chemical_classification, Phytoene desaturase, biology, Stereochemistry, Biological activity, General Chemistry, Catharanthus roseus, biology.organism_classification, chemistry.chemical_compound, Pigment, Phytoene, chemistry, Biochemistry, Biosynthesis, Thylakoid, visual_art, visual_art.visual_art_medium, General Agricultural and Biological Sciences, Carotenoid
Abstract

Physiological and biochemical properties of bleaching 2,6-diphenylpyridines have been investigated. Treatment of cress plantlets and Anacystis cultures resulted in decreased formation of colored carotenoids and a concurrent accumulation of 15-cis-pytoene. The direct interaction of this new clans of herbicidal inhibitors on cell-free phytoene desaturation was demonstrated with a carotenogenic in vitro system using Anacystis membranes. Structure-activity studies with five derivatives showed for these pyridines the electronic equivalence of the ring-N=imine with the C=-O element present in many other herbicidal phytoene desaturase inhibitors

Published
1992

3. Fused Heterocycles, Furo[3,2-d]pyrimidines and Dihydrocyclopenta[d]pyrimidines, as Potential New Herbicides

Author

Masaharu Sakaki, Sato Junichi, Tatsuhiro Hamada, Shinichi Kawamura, and Yuzuru Sanemitsu

Subjects
Chemistry, Stereochemistry, Organic Chemistry, Organic chemistry, General Medicine, Molecular Biology, Applied Microbiology and Biotechnology, Biochemistry, Chemical synthesis, Analytical Chemistry, Biotechnology
Abstract

(1992). Fused Heterocycles, Furo[3,2-d]pyrimidines and Dihydrocyclopenta[d]pyrimidines, as Potential New Herbicides. Bioscience, Biotechnology, and Biochemistry: Vol. 56, No. 11, pp. 1897-1899.

Published
1992

4. 2,6-Diphenylpyridines: a new class of herbicides

Author

Ryo Sato, Tatsuhiro Hamada, Gerhard Sandmann, Peter. Babczinski, Shinichi Kawamura, and Yuzuru Sanemitsu

Subjects
New class, Stereochemistry, Chemistry, General Chemistry, General Agricultural and Biological Sciences
Published
1991

5. Diphenylpyridines

Author

Shinichi Kawamura, Tatsuhiro Hamada, Ryo Sato, Yuzuru Sanemitsu, Gerhard Sandmann, and Peter Babczinski

Published
1992

6. Synthesis and Chemistry of Agrochemicals III

Author

DON R. BAKER, JOSEPH G. FENYES, JAMES J. STEFFENS, William A. Kleschick, Mark J. Costales, B. Clifford Gerwick, J. B. Holtwick, R. W. Meikle, W. T. Monte, N. R. Pearson, S. W. Snider, M. V. Subramanian, J. C. VanHeertum, A. P. Vinogradoff, C. M. Carson, J. J. Doney, J. C. Little, S. Yamamoto, T. Sato, K. Morimoto, T. Nawamaki, S. Murai, Y. Nakamura, T. Akagi, N. Sakashita, T. Haga, M. A. Guaciaro, M. Los, D. L. Little, P. A. Marc, L. Quakenbush, S. I. Alvarado, A. D. Crews, P. J. Wepplo, R. F. Doehner, T. E. Brady, D. M. Gange, Frank X. Woolard, Thomas P. Selby, Tariq A. Andrea, L. Radu Denes, Bruce L. Finkelstein, Thomas P. Fuesler, Ben K. Smith, Shinichi Kawamura, Tatsuhiro Hamada, Ryo Sato, Yuzuru Sanemitsu, Gerhard Sandmann, Peter Babczinski, R. E. Hackler, T. W. Waldrep, S. V. Kaster, George Theodoridis, Frederick W. Hotzman, Lynn W. Scherer, Bruce A. Smith, John M. Tymonko, Michael J. Wyle, Jonathan S. Baum, Mark C. Manfredi, Lester L. Maravetz, John W. Lyga, Kenneth R. Wilson, Kathleen M. Poss, Kurt Moedritzer, Sarah G. Allgood, Pana Charumilin, DON R. BAKER, JOSEPH G. FENYES, JAMES J. STEFFENS, William A. Kleschick, Mark J. Costales, B. Clifford Gerwick, J. B. Holtwick, R. W. Meikle, W. T. Monte, N. R. Pearson, S. W. Snider, M. V. Subramanian, J. C. VanHeertum, A. P. Vinogradoff, C. M. Carson, J. J. Doney, J. C. Little, S. Yamamoto, T. Sato, K. Morimoto, T. Nawamaki, S. Murai, Y. Nakamura, T. Akagi, N. Sakashita, T. Haga, M. A. Guaciaro, M. Los, D. L. Little, P. A. Marc, L. Quakenbush, S. I. Alvarado, A. D. Crews, P. J. Wepplo, R. F. Doehner, T. E. Brady, D. M. Gange, Frank X. Woolard, Thomas P. Selby, Tariq A. Andrea, L. Radu Denes, Bruce L. Finkelstein, Thomas P. Fuesler, Ben K. Smith, Shinichi Kawamura, Tatsuhiro Hamada, Ryo Sato, Yuzuru Sanemitsu, Gerhard Sandmann, Peter Babczinski, R. E. Hackler, T. W. Waldrep, S. V. Kaster, George Theodoridis, Frederick W. Hotzman, Lynn W. Scherer, Bruce A. Smith, John M. Tymonko, Michael J. Wyle, Jonathan S. Baum, Mark C. Manfredi, Lester L. Maravetz, John W. Lyga, Kenneth R. Wilson, Kathleen M. Poss, Kurt Moedritzer, Sarah G. Allgood, and Pana Charumilin

Published
1992

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