http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1435179-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_3a5173a7d063a9f70ca7b5e86fc23863 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C09B11-24 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D295-155 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-885 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-88 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B11-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-885 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D295-155 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B41M5-145 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B11-24 |
| filingDate | 1973-12-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1976-05-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1435179-A |
| titleOfInvention | Phthalides and preparation thereof |
| abstract | 1435179 Phthalide colour precursors STERLING DRUG Inc 10 Dec 1973 [12 Dec 1972] 57165/73 Heading C4P [Also in Division C2] The invention comprises compounds of Formula I where X is di-(C 1-4 non-tertiary alkyl)amino; Y<SP>2</SP> is H, C 1-4 non-tertiary alkyl, di-(C 1-4 non- tertiary alkyl)amino, C 2-5 alkanoylamino, C 1-4 non-tertiary alkoxy or halogen; Y<SP>4</SP> is the same as Y<SP>2</SP> when Y<SP>2</SP> is dialkylamino or Y<SP>4</SP> is di- (C 1-4 non-tertiary alkyl)amino, pyrrolidino, piperidino or (C 1-4 non-tertiary alkyl) (Q- (CH 2 ) n )amino where Q is OH or Cl and n is 2 to 4 when Y<SP>2</SP> is other than dialkylamino; Z<SP>4</SP> and Z<SP>7</SP> are H or halogen; and each of Z<SP>5</SP> and Z<SP>6</SP> is H or halogen or if all of Z<SP>4</SP>, Z<SP>7</SP> find Z<SP>6</SP> or Z<SP>5</SP> are H then Z<SP>5</SP> or Z<SP>6</SP>, respectively, may also be C 1-4 non-tertiary alkyl, NO 2 , NH 2 , di-(C 1-4 non-tertiary alkyl)amino or halogen, with the proviso that Y<SP>2</SP> is only hydrogen if Z<SP>5</SP> or Z<SP>6</SP> is other than hydrogen or halogen. Compounds of Formula I in which Z<SP>5</SP> or Z<SP>6</SP> is not amino and Y<SP>4</SP> is not alkyl (Q-(CH 2 ) n )amino where Q is hydroxy may be prepared by condensing a compound of Formula IV with a compound of Formula V in contact with the anhydride of a C 2-5 alkanoic acid, POCl 3 or SOCl 2 , where Q and R correspond to Y<SP>4</SP> and Y<SP>2</SP> respectively and Q<SP>1</SP> and R<SP>1</SP> correspond to X, or Q and R correspond to X and Q<SP>1</SP> and R<SP>1</SP> correspond to Y<SP>4</SP> and Y<SP>2</SP> respectively. Compounds of Formula I in which Y<SP>4</SP> is alkyl (Q-(CH 2 ) n )amino where Q is hydroxy or Z<SP>5</SP> or Z<SP>6</SP> is amino may be prepared by carrying out the above process with the appropriate starting materials and using a C 2-5 alkanoic acid anhydride and dealkanoylating the product. Compounds of Formula I in which Z<SP>5</SP> or Z<SP>6</SP> is NH 2 may also be prepared by reducing corresponding compounds in which Z<SP>5</SP> or Z<SP>6</SP> is NO 2 , which compounds may in turn be prepared by nitration of corresponding compounds in which Z<SP>5</SP> and Z<SP>6</SP> are hydrogen. Compounds of Formula I in which Z<SP>5</SP> or Z<SP>6</SP> is halogen may also be prepared by halogenating diazonium salts derived from corresponding compounds in which Z<SP>5</SP> or Z<SP>6</SP> is NH 2 . The compounds of Formula I, which are colourless under neutral or basic conditions but coloured when contacted with an acid, are used as colour precursors, particularly in pressure-sensitive duplicating systems. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-2138836-A |
| priorityDate | 1972-12-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 28.