Title:
ピレスロイド化合物の合成中間体の製造方法
Document Type and Number:
Japanese Patent JP4685779
Kind Code:
B2
Abstract:
Methods for preparing 2,3,5,6-tetrafluorodimethylolbenzene, an intermediate for the preparation of pyrethroids, are disclosed. A method for preparing 2,3,5,6-tetrafluorodimethylolbenzene includes the reduction of tetrafluoroterephthalate. Various reduction processes are disclosed, which are simple and safe and can afford the product in high yield and purity. Processes for preparing tefluthrin from 2,3,5,6-tetrafluorodimethylolbenzene, by halogenation, hydrogenation, and esterification, are also disclosed.
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Inventors:
Dynasty
Kangyu Law
Kangyu Law
Application Number:
JP2006529548A
Publication Date:
May 18, 2011
Filing Date:
January 13, 2004
Export Citation:
Assignee:
Jiangsu Yangnou Chemical Co., Ltd.
International Classes:
C07C29/147; C07C29/149; C07C33/46; C07C51/00; C07C67/08; C07C67/14; C07C69/747; C07C69/76; C07B61/00
Domestic Patent References:
| JP2002332251A | ||||
| JP2001500880A | ||||
| JP57123146A | ||||
| JP47022814B1 | ||||
| JP2004512319A | ||||
| JP55111445A |
Foreign References:
| CN1458137A |
Attorney, Agent or Firm:
Ohta Kengaku
Akio Miyazaki
Ishibashi Masayuki
Masaaki Ogata
Akio Miyazaki
Ishibashi Masayuki
Masaaki Ogata