GB869372A - Improvements relating to 4-nitrostyryl-2-sulphonic acid compounds - Google Patents
Improvements relating to 4-nitrostyryl-2-sulphonic acid compoundsInfo
- Publication number
- GB869372A GB869372A GB13375/58A GB1337558A GB869372A GB 869372 A GB869372 A GB 869372A GB 13375/58 A GB13375/58 A GB 13375/58A GB 1337558 A GB1337558 A GB 1337558A GB 869372 A GB869372 A GB 869372A
- Authority
- GB
- United Kingdom
- Prior art keywords
- nitro
- sulphonic acid
- sulphonic
- aldehyde
- benzaldehyde
- 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
- C07C303/00—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides
- C07C303/02—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof
- C07C303/22—Preparation of esters or amides of sulfuric acids; Preparation of sulfonic acids or of their esters, halides, anhydrides or amides of sulfonic acids or halides thereof from sulfonic acids, by reactions not involving the formation of sulfo or halosulfonyl groups; from sulfonic halides by reactions not involving the formation of halosulfonyl groups
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
A process for the production of 4-nitrostyryl-2-sulphonic acid-aryl compounds of the general formula: <FORM:0869372/IV (b)/1> wherein Ar represents an aromatic radical or heterocyclic radical of aromatic character is characterised by condensing at temperatures of over 100 DEG C., 4-nitro-1-methylbenzene-2-sulphonic acid in the form of an alkali metal salt, an alkaline earth metal salt or a salt with a saturated organic nitrogenous base which salt either melts or is soluble in organic solvents with an aromatic aldehyde or heterocyclic aldehyde of aromatic character in the presence of a saturated secondary base as condensing agent, the condensation preferably being performed in the presence of hydrophilic organic solvents. In a modification of the process the aldehyde may be used in the form of its condensation product with 2 mols of secondary amine. Examples of saturated organic nitrogenous bases specified are dimethylamine and piperidine. Solvents mentioned include amides of formic and acetic acids and saturated organic sulphones and formamide being preferred. Alkali metal and alkaline earth metal salts specified include sulphoxides, dimethyl sulphoxide and dimethyl those of lithium, sodium, potassium, beryllium and magnesium. Aldehydes employed in the process may contain as substituents halogen, alkyl, alkoxy, cyano, alkyl or aryl sulphone-, tertiary sulphonic acid amide, nitro, acylamino, sulphonic and dialkyl-amino groups, specific examples being benzaldehyde, 4-acetylamino-2-methoxy benzaldehyde, thiophene-2-aldehyde pyridine-2-aldehyde, benzaldehyde 2-sulphonic acid and p-dimethyl amino benzaldehyde, isophthaldehyde and terephthaldehyde. Examples Examples are furnished relating to the production of sodium salts of 4-nitrostilbene-2-sulphonic acid, 4-nitro-41-acetylamino-21-methoxyand ethoxy stilbene-2-sulphonic acids, 1:4-bis (21-sulpho-41-nitrostyryl)-benzene, 2-[41-nitro -21-sulphonic acid-styryl]-thiophene and -pyridine, 4-nitro-21-ethoxy- and 4-nitro-21-ethoxy-31 -methoxystilbene-2-sulphonic acids, 4-nitro-41-methyl -stilbene-2-sulphonic acid, 41-nitro-2141 -dimethylstilbene-2-sulphonic acid, 4-nitrostilbene-2-21-disulphonic acid and 4-nitro-41-dimethylaminostilbene-2-sulphonic acid. The products of the process may be employed as starting materials for the production of optical brightening agents. Specifications 668,200, 718,962 and 779,842 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH869372X | 1957-04-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB869372A true GB869372A (en) | 1961-05-31 |
Family
ID=4543903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13375/58A Expired GB869372A (en) | 1957-04-29 | 1958-04-28 | Improvements relating to 4-nitrostyryl-2-sulphonic acid compounds |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB869372A (en) |
-
1958
- 1958-04-28 GB GB13375/58A patent/GB869372A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2485212A (en) | 2-[phenthiazinyl-(n)-methyl]-imidazolines, the corresponding 2-(phenoxazinyl) imidazolines, and their salts | |
| Albertson | Alkylation with non-ketonic Mannich bases. Aminothiazoles and pyrrole | |
| GB869372A (en) | Improvements relating to 4-nitrostyryl-2-sulphonic acid compounds | |
| US2636037A (en) | 2-amino-4-piperidinoethyl-thiazole | |
| Stacy et al. | The Addition of the Thiol Group to Schiff Base Systems. I. Benzalanthranilic Acid1 | |
| GB1472849A (en) | Process for the preparation of 2-aminobenzothiazoles | |
| GB842322A (en) | Aminoguanidine derivatives | |
| GB721171A (en) | Derivatives of ª‰- and ª†- carbolines | |
| ES419319A1 (en) | Amide derivatives of 3-benzoylphenyl-alkanoic acids | |
| Chi et al. | Thiazole Research: Synthesis of 2-Phthalimidomethyl-4-N-diethylamino-methylthiazole | |
| GB1123762A (en) | Improved process for the production of 5-cyano-uracil compounds and new intermediate products that can be formed thereby | |
| US2692881A (en) | Benzothiazole derivatives | |
| GB738676A (en) | New 2-substituted benzthiazole compounds and silver halide emulsions containing them | |
| US2460224A (en) | Biotin intermediate | |
| GB629123A (en) | Improvements in the manufacture of intermediates for the production of dyes, in the manufacture of polymethin dyes and in photographic silver salt emulsions containing such dyes | |
| GB1082977A (en) | Quaternary oxa-, selena- and thio-azole derivatives and cyanine dyes derived therefrom | |
| US2451310A (en) | Alkyl esters of alpha-acylamino, alpha-cyano, beta-(3 indole)-propionic acid | |
| GB679894A (en) | Production of thiosemicarbazones | |
| GB842324A (en) | Aminoguanidine derivatives | |
| GB990627A (en) | Method of preparing non-migratory colour couplers for yellow | |
| Green et al. | The Preparation of the Trityl Ether of Propylene Glycol | |
| GB497042A (en) | New urea derivatives | |
| Kleene | New Compounds. α Naphthylcyclopentanol-1 | |
| GB774649A (en) | Tetrahydroisoquinolino-alkyl--ß-phenoxy ethers and process of making same | |
| GB784892A (en) | Piperidine derivatives and process for their manufacture |