http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-738632-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_fcbc1de8801460caf80ad76627ae20b0 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B50-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B50-04 |
| filingDate | 1952-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0b37b43c1f0cd1aa5143bb050371476e http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_d3a627b282bdfa00f2f16ce48a2a7df0 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_35eed61590f02076f0a24b7974487f6a |
| publicationDate | 1955-10-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-738632-A |
| titleOfInvention | Improvements in or relating to formazans |
| abstract | The invention comprises formazans of the formula R2-NH-N=C(R1)-N=N-R3 where R1 is alkyl or aryl and R2 and R3 are aryl, at least one of the latter being p-substituted by -N:N-aryl or -CH:CH-aryl. The aromatic nuclei may also carry halogen, nitro, hydroxyl, alkyl, acylamino, quaternary ammonium, carboxyl or alkoxyl substituents. The compounds are made by coupling diazotized amines R3NH2 with hydrazones R2-NH-N=CH-R1, preferably in a basic medium such as pyridine below 15 DEG C. They are intermediates for the tetrazolium salts of Specification 738,585, [Group IV (b)]. In the examples the following substituted formazans are prepared: 1 : 3-diphenyl - 5 -(p - phenylazophenyl), 1 : 3-diphenyl - 5 - [p - (p - nitrophenylazo) - phenyl], 1 - (p - chlorophenyl) - 3 - phenyl - 5 - (p - phenylazophenyl), 1 - (p - acetamidophenyl) - 3 - phenyl - 5 - (p - phenylazophenyl), 1 : 3 - diphenyl - 5 - (41 - phenylazo - 11 - naphthyl), 1 - phenyl - 3 - methyl - 5 - (p - phenylazophenyl), 1 : 3 - diphenyl - 5 - [p - (p - chlorophenylazo) - phenyl], 1 : 3 - diphenyl - 5 - [p - (p - tolylazo) - phenyl], 1 - (p - carboxyphenyl) - 3 - phenyl - 5 - (p - phenylazophenyl), 1 : 3 - diphenyl - 5 - (21 : 31 - dimethyl - 41 - phenylazophenyl), 1 : 3 - diphenyl - 5 - [p - (p - hydroxyphenylazo) - phenyl], 1 : 3 - diphenyl - 5 - [p - (211 - chloro - 411 - hydroxyphenylazo) - phenyl], 1 : 3 - diphenyl - 5 - [p - (311 - chloro - 411 - hydroxy phenylazo) phenyl], 1 phenyl 5 - (p - phenylazophenyl) - 3 - (p - hydroxyphenyl) via the p-acetoxy compound subsequently hydrolysed, quaternary methochloride of 1-phenyl-3-(p-dimethylaminophenyl) - 5 - [p - (p - hydroxyphenylazo) - phenyl], 1 : 3 - diphenyl - 5 - (p - styrylphenyl), 1 : 3 - diphenyl - 5 - [p - (p - acetamidostyryl) - phenyl], 1 : 3 - diphenyl - 5 - [p - (p - bromostyryl) - phenyl], 1 : 3 - diphenyl - 5 - [p - (p - hydroxystyryl) - phenyl], 1 - phenyl - 3 - (p - bromophenyl) - 5 - (p - styrylphenyl), 1 - phenyl - 3 - (p - methoxyphenyl) - 5 - (p - styrylphenyl), 1 : 3 - diphenyl - 5 - [p - (p - nitrostyryl) - phenyl], 1 - phenyl - 3 - methyl - 5 - (p - styrylphenyl), 1 - phenyl - 3 - methyl - 5 [p - (p - nitrostyryl) - phenyl], 1 - (p - phenylazophenyl) - 3 - phenyl - 5 - (p - styrylphenyl), 1-(p-phenylazophenyl) - 3 - (p - acetoxyphenyl) - 5 - (p - styrylphenyl), and 1 - (p - phenylazophenyl) - 3 - (p - carboxyphenyl) - 5 - (p - styrylphenyl).ALSO:p - Acetoxybenzaldehyde 4 - phenylazophenylhydrazone and p-carboxybenzaldehyde 4-phenylazophenylhydrazone are made by reacting 4-phenylazophenylhydrazine b -sulphonic acid with p-acetoxybenzaldehyde and terephthalaldehydic acid respectively. The latter is obtained as the ammonium salt. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-106905715-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-106905715-A |
| priorityDate | 1952-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 34.