GB735899A - Manufacture of hydrazine compounds - Google Patents
Manufacture of hydrazine compoundsInfo
- Publication number
- GB735899A GB735899A GB421/53A GB42153A GB735899A GB 735899 A GB735899 A GB 735899A GB 421/53 A GB421/53 A GB 421/53A GB 42153 A GB42153 A GB 42153A GB 735899 A GB735899 A GB 735899A
- Authority
- GB
- United Kingdom
- Prior art keywords
- mercapto
- phthalazine
- hydrazino
- prepared
- reacting
- 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.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D237/00—Heterocyclic compounds containing 1,2-diazine or hydrogenated 1,2-diazine rings
- C07D237/26—Heterocyclic compounds containing 1,2-diazine or hydrogenated 1,2-diazine rings condensed with carbocyclic rings or ring systems
- C07D237/30—Phthalazines
- C07D237/34—Phthalazines with nitrogen atoms directly attached to carbon atoms of the nitrogen-containing ring, e.g. hydrazine radicals
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A process for the manufacture of compounds which contain a pyridazine ring and also contain a hydrazino group in at least one of the two ortho-positions relative to the ring nitrogen atoms comprises reacting hydrazine with a compound which contains a pyridazine ring and also contains an unsubstituted mercapto group in at least one of the two ortho-positions relative to the ring nitrogen atoms, or with a corresponding disulphide. The reactant containing the pyridazine ring may be used in the form of a salt. The reaction is advantageously carried out in the presence of an inert diluent, and in the presence of a condensing agent, and preferably at an elevated temperature. Suitable reactants are mercapto-phthalazines especially 1-mercapto- and 1 : 4-dimercapto-phthalazine, and mercapto-pyridazines especially 3-mercapto - 6 - aryl - and 3 - mercapto - 6 - alkylpyridazine, particularly 3-mercapto-6-phenylpyridazine, and the corresponding disulphides such as 1 : 11-dithio-bis-(4-phenyl-phthalazine). In the examples the following compounds are prepared: 1-hydrazino-, 1,4-dihydrazino- and 1-hydrazino-4-methyl-phthalazine. 1 - Hydrazino - 4 - mercapto - phthalazine is prepared by reacting 1-hydrazino-4-chlorophthalazine with alcoholic potassium hydrosulphide. Bis - phthalazyl - (1) - disulphide is prepared by reacting 1-mercapto-phthalazine with bromine in glacial acetic acid and treating the resulting dihydrobromide salt with caustic soda. Specifications 629,177 and 654,821 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH735899X | 1952-01-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB735899A true GB735899A (en) | 1955-08-31 |
Family
ID=4532724
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB421/53A Expired GB735899A (en) | 1952-01-18 | 1953-01-06 | Manufacture of hydrazine compounds |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB735899A (en) |
-
1953
- 1953-01-06 GB GB421/53A patent/GB735899A/en not_active Expired
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