JPS5545647A - Novel 2,3-dicyanopirazine derivative, its preparation, and herbicide containing the compound as effective component - Google Patents
Novel 2,3-dicyanopirazine derivative, its preparation, and herbicide containing the compound as effective componentInfo
- Publication number
- JPS5545647A JPS5545647A JP11914078A JP11914078A JPS5545647A JP S5545647 A JPS5545647 A JP S5545647A JP 11914078 A JP11914078 A JP 11914078A JP 11914078 A JP11914078 A JP 11914078A JP S5545647 A JPS5545647 A JP S5545647A
- Authority
- JP
- Japan
- Prior art keywords
- compound
- halogen
- derivative
- herbicide
- dicyanopirazine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
NEW MATERIAL:2,3-Dicyanopyrazine derivative of formula I (R is halogen or lower alkyl; A is halogen or OH).
EXAMPLE: 2,3-Dicyano-5-hydroxy-6-(3-chlorophenyl)pyrazine.
USE: Herbicide and its intermediate. Selective harbicidal activity. forms a solid herbicidal layer to the surface of a paddy field, and effective as a herbicide for paddy rice field.
PROCESS: The compound IV is prepared by reacting diaminomaleonitrile II with a substituted-phenyl glyoxylic acid III in a solvent such as water or methanol, in the presence of dehydrative condensation catalyst such as HCl or acetic acid, at room temperature to 150°C. The compound I wherein A is halogen, is prepared by reacting the compound IV with a halogenating agent.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11914078A JPS5545647A (en) | 1978-09-29 | 1978-09-29 | Novel 2,3-dicyanopirazine derivative, its preparation, and herbicide containing the compound as effective component |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11914078A JPS5545647A (en) | 1978-09-29 | 1978-09-29 | Novel 2,3-dicyanopirazine derivative, its preparation, and herbicide containing the compound as effective component |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5545647A true JPS5545647A (en) | 1980-03-31 |
JPS6148506B2 JPS6148506B2 (en) | 1986-10-24 |
Family
ID=14753910
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11914078A Granted JPS5545647A (en) | 1978-09-29 | 1978-09-29 | Novel 2,3-dicyanopirazine derivative, its preparation, and herbicide containing the compound as effective component |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5545647A (en) |
-
1978
- 1978-09-29 JP JP11914078A patent/JPS5545647A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS6148506B2 (en) | 1986-10-24 |
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