JPS574955A - Reducing method of benzenediazonium sulfate - Google Patents
Reducing method of benzenediazonium sulfateInfo
- Publication number
- JPS574955A JPS574955A JP7853280A JP7853280A JPS574955A JP S574955 A JPS574955 A JP S574955A JP 7853280 A JP7853280 A JP 7853280A JP 7853280 A JP7853280 A JP 7853280A JP S574955 A JPS574955 A JP S574955A
- Authority
- JP
- Japan
- Prior art keywords
- phenylhydrazine
- reducing
- benzenediazonium sulfate
- ammonium
- benzenediazonium
- 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
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
PURPOSE: To obtain phenylhydrazine useful as an intermediate for medicine, dye, etc. in high yield, by reducing benzenediazonium sulfate with ammonium sulfite and ammonium hydrogensulfite as reducing agents under specific conditions.
CONSTITUTION: Benzenediazonium sulfate is reduced with ammonium sulfite and ammonium hydrogensulfite as reducing agents in an aqueous medium at pH 5.2W 7.0 under a pressure of the saturated vapor pressure of the reaction mixture to 10kg/cm2.gauge to give an acid salt of phenylhydrazine. The resultant compound is then reacted with a base and converted into phenylhydrazine. The reducing raction is preferably carried out at 30W50°C for 30min or longer in the initial period of the reaction and then at 80W100°C. The starting material benzenediazonium sulfate can be obtained by diazotizing aniline with nitrous acid, etc. in an aqueous solution of sulfuric acid.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7853280A JPS599544B2 (en) | 1980-06-10 | 1980-06-10 | Method for reducing benzenediazonium sulfate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7853280A JPS599544B2 (en) | 1980-06-10 | 1980-06-10 | Method for reducing benzenediazonium sulfate |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS574955A true JPS574955A (en) | 1982-01-11 |
JPS599544B2 JPS599544B2 (en) | 1984-03-03 |
Family
ID=13664514
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7853280A Expired JPS599544B2 (en) | 1980-06-10 | 1980-06-10 | Method for reducing benzenediazonium sulfate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS599544B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0424591A (en) * | 1990-05-18 | 1992-01-28 | Oki Electric Ind Co Ltd | Medium detection device |
JP2001233841A (en) * | 2000-02-21 | 2001-08-28 | Sumitomo Chem Co Ltd | Method for producing phenylhydrazines |
-
1980
- 1980-06-10 JP JP7853280A patent/JPS599544B2/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0424591A (en) * | 1990-05-18 | 1992-01-28 | Oki Electric Ind Co Ltd | Medium detection device |
JP2001233841A (en) * | 2000-02-21 | 2001-08-28 | Sumitomo Chem Co Ltd | Method for producing phenylhydrazines |
Also Published As
Publication number | Publication date |
---|---|
JPS599544B2 (en) | 1984-03-03 |
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