GB659897A - Improvements in or relating to processes of diazotising amino compounds - Google Patents
Improvements in or relating to processes of diazotising amino compoundsInfo
- Publication number
- GB659897A GB659897A GB1627/49A GB162749A GB659897A GB 659897 A GB659897 A GB 659897A GB 1627/49 A GB1627/49 A GB 1627/49A GB 162749 A GB162749 A GB 162749A GB 659897 A GB659897 A GB 659897A
- Authority
- GB
- United Kingdom
- Prior art keywords
- acid
- amino
- sodium nitrite
- diazo compound
- added
- 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
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C245/00—Compounds containing chains of at least two nitrogen atoms with at least one nitrogen-to-nitrogen multiple bond
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Acid amino compounds which are diazotizable and of low solubility in water, and of which the diazo compound is of an acidity greater than that of nitrous acid, are diazotized by dispersing the amino compound in an aqueous liquid containing at least an equivalent amount of a salt of nitrous acid, and initiating the reaction by adding an amount considerably less than the equivalent (e.g. less than 2 mol. per cent) of an acid which is capable of liberating nitrous acid from its salts and which does not form an insoluble substance with either the amino compound or the diazo compound to be prepared. In examples: (1) 6-methyl-2-aminophenol-4-sulphonic acid is stirred with an aqueous solution of sodium nitrite, and fluoboric acid is added, producing a precipitate of the sodium salt of the diazo compound; (2) the sodium nitrite in (1) is replaced by silver nitrite yielding the silver salt of the diazo compound; (3) nitric acid is added to a suspension of 2-aminophenol-4-sulphonic acid in an aqueous solution of sodium nitrite; (4) hydrochloric acid is added to a suspension of 1-amino-2-naphthol-4-carboxylic acid in an aqueous solution of sodium nitrite.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL659897X | 1948-01-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB659897A true GB659897A (en) | 1951-10-31 |
Family
ID=19795357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1627/49A Expired GB659897A (en) | 1948-01-23 | 1949-01-20 | Improvements in or relating to processes of diazotising amino compounds |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR979368A (en) |
| GB (1) | GB659897A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2861984A (en) * | 1957-01-28 | 1958-11-25 | Allied Chem & Dye Corp | Production of aromatic fluorides |
-
1949
- 1949-01-20 GB GB1627/49A patent/GB659897A/en not_active Expired
- 1949-01-21 FR FR979368D patent/FR979368A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2861984A (en) * | 1957-01-28 | 1958-11-25 | Allied Chem & Dye Corp | Production of aromatic fluorides |
Also Published As
| Publication number | Publication date |
|---|---|
| FR979368A (en) | 1951-04-25 |
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