Natsuko Okano
Mitsubishi Chemical Corporation
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Publication
Featured researches published by Natsuko Okano.
Journal of Pesticide Science | 2001
Tomoyuki Yano; Natsuko Okano; Sadayuki Ugai; Masahiro Hori; Kenji Hirai
A series of new 3-(5-alkoxy-2,4-dihalophenyl)-5-alkylidene-1,3-imidazolidine-2,4-dione derivatives was synthesized and their herbicidal activities against various weeds were examined. The herbicidal activities varied with the substituents on the benzene ring and the compounds having a 5-alkynyloxy-4-chloro-2-fluorophenyl group exhibited relatively higher herbicidal activites. In the case of monocyclic imidazolidinedione derivatives, introduction of an isopropylidene group at the 5-position and a lower alkyl group at the 1-position of the imidazolidinedione ring was most effective in enhancing the activity. In the case of bicyclic imidazolidinedione derivatives, 5,6-dihydroimidazo [1,5-a] pyridine derivatives gave a higher selectivity than tetrahydroimidazo [1,5-a] pyridine derivatives, therefore, it was thought that the presence of a double bond was important for the crop safety. Among the compounds synthesized, a bicyclic imidazolidinedione compound, 2-(4-chloro-2-fluoro-5-propargyloxyphenyl)-5,6-dihydroimidazo [1,5-a] pyridine-1,3 [2H,7H]-dione is considered to be the most promising candidate as a corn herbicide.
Archive | 1999
Kenji Hirai; Takeshi Yoshizawa; Natsuko Okano; Yuriko Yoshino; Chikako Ota; Toshiki Mitsubishi Chemical Corp. Fukuchi; Hirofumi Tomita; Shinji Kawaguchi
Archive | 1998
Kenji Hirai; Takeshi Yoshizawa; Sachiko Itoh; Natsuko Okano; Yuriko Nagata; Chikako Ota; Toshiki Mitsubishi Chemical Corp. Fukuchi; Keiko Yoshiya
Archive | 1999
Toshiki Fukuchi; Kenji Hirai; Maho Nagaoka; Natsuko Okano; Ryuta Ono; Chikako Ota; Atsushi Uchida; 淳 内田; 竜太 大野; 千香子 太田; 夏子 岡野; 憲次 平井; 俊樹 福地; 真帆 長岡
Archive | 2001
Toshiki Fukuchi; Kenji Hirai; Maho Nagaoka; Natsuko Okano; Ryuta Ono; Chikako Ota; Kenichi Sato; Risa Yamada; 健一 佐藤; 竜太 大野; 千香子 太田; 里砂 山田; 夏子 岡野; 憲次 平井; 俊樹 福地; 真帆 長岡
Archive | 1999
Toshiki Fukuchi; Kenji Hirai; Kazuhiko Kikutake; Maho Nagaoka; Natsuko Okano; Ryuta Ono; Chikako Ota; Atsushi Uchida; 淳 内田; 竜太 大野; 千香子 太田; 夏子 岡野; 憲次 平井; 俊樹 福地; 和彦 菊武; 真帆 長岡
Archive | 1999
Kenji Hirai; Ryuta Ohno; Natsuko Okano; Maho Nagaoka; Atsushi Uchida; Yuriko Yoshino; Chikako Ota; Toshiki Fukuchi; Kazuhiko Kikutake; Shinji Kawaguchi
Archive | 1999
Kenji Hirai; Takeshi Yoshizawa; Natsuko Okano; Yuriko Yoshino; Chikako Ota; Toshiki Fukuchi; Hirofumi Tomita; Shinji Kawaguchi
Archive | 1998
Kenji Hirai; Takeshi Yoshizawa; Sachiko Itoh; Natsuko Okano; Yuriko Nagata; Chikako Ota; Toshiki Mitsubishi Chemical Corp. Fukuchi; Keiko Yoshiya
Archive | 1998
Kenji Hirai; Takeshi Yoshizawa; Sachiko Itoh; Natsuko Okano; Yuriko Nagata; Chikako Ota; Toshiki Mitsubishi Chemical Corp. Fukuchi; Keiko Yoshiya
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Toshiki Mitsubishi Chemical Corp. Fukuchi
Mitsubishi Chemical Corporation
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