http://rdf.ncbi.nlm.nih.gov/pubchem/patent/IE-35006-L
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_03d0f52bb4069f8a19d70dcfb697c67a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D513-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/B41M5-15 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D513-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B41M5-15 |
| filingDate | 1970-10-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1971-04-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | IE-35006-L |
| titleOfInvention | Spirobenzothiazoline-benzoxazines;pressure-sensitive copying¹paper. |
| abstract | 1275695 Spiro-[benzothiazoline-2,21-(11,3)- benzoxazines] FUJI PHOTO FILM CO Ltd 6 Oct 1970 [8 Oct 1969] 47483/70 Heading C2C [Also in Division D2] Novel spiro compounds of the formula in which R 1 is C 1-4 alkyl and R 2 and R 3 are each hydrogen, halogen, nitro, C 1-4 alkoxy, C 1-4 alkoxy-carbonyl or formyl groups, are obtained by condensing a 3-R 1 -2-aminobenzothiazolium halide or p-toluenesulphonate with a salicylaldehyde of the formula by refluxing the reactants in ethanol in the presence of triethylamine. Examples describe the preparation of the 3-methyl, 3-methyl-6<SP>1</SP>- nitro-, 3-methyl-61-nitro-81-formyl-, 3-methyl- 6<SP>1</SP>,8<SP>1</SP>-dibromo- and 3-methyl-6<SP>1</SP>-nitro-8<SP>1</SP>-methoxy - spiro - [benzothiazoline - 2,21 - 2<SP>1</SP>H - (1,3)- benzoxazines]. The spiro compounds develop colour on contact with an acid and are used in pressure sensitive copying papers (see Division D2).n[GB1275695A] |
| priorityDate | 1969-10-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 24.