http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2319643-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d0cb7734bc2e5840db630f0ae7c29684 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03C1-685 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D513-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D263-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D277-10 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03C1-685 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D513-10 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D263-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D277-10 |
| filingDate | 1975-07-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1fcfee333fb7ff77fbc87aaaf7bf8461 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b51fbbc3bcd809c97b8e32a6a906acad http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_696e7f0b48e05ceb56c64c9dff06f077 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a6dc0311a92ced50b23da80e11767a06 |
| publicationDate | 1977-02-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | FR-2319643-A1 |
| titleOfInvention | DERIVATIVES OF SPIROPYRANS, THEIR PROCESS OF PREPARATION AND THEIR APPLICATION FOR THE RECORDING OF INFORMATION BY OPTICAL |
| abstract | Novel spiropyrans are of formula (I) and/or (II) these being opt. in equilibrium. In the formulae X is O or S; R1 is 1-18C alkyl; an aryl substd. by >=1 electron-attracting or -repelling gp. and/or comprising >=1 opt. unsatd. adjacent rings pref. contg. 1-4C; an arylalkyl with 1-5C alkyl; an alicyclic gp. contg. 4-10 CH2 gps.; a functional electron ron-repelling gp. chosen from 1-16C opt. branched alkoxy gp. aryloxy, mercaptoalkyl and arylalkoxy in which the alkyl or alkoxy gp. contain 1-16C, and mercaptoaryl; R2 is an electron-attracting gp. when R3 is electron-repelling and vice versa; R4 is 1-18C alkyl, arylalkyl contg. 1-5C alkyl, 1-10C alkenyl R5-8 are one of the above mentioned gps. or H, or taken by pair, form a 5-18C homocycle or a carbonyl gp. A specific cpd. (I) has R1=OCH3. R2=NO2, R3=H, R4=-CH(CH3)2, R5-7=H and R8=CH3. (I) are useful for the optical recording of information on transparent or opaque supports, for non-conventional photography, prodn. of thermally erasable stable latent images. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4358598-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0012079-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/FR-2442849-A1 |
| priorityDate | 1975-07-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
| Predicate | Subject |
|---|---|
| isDiscussedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID457814461 http://rdf.ncbi.nlm.nih.gov/pubchem/substance/SID458393661 |
Total number of triples: 25.