http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-1370898-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_be92719b856db86c092cc233e9512ca2 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03G5-067 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/G03G5-0637 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D311-58 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D311-58 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D311-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C09B23-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/G03G5-06 |
| filingDate | 1971-12-23-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1974-10-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-1370898-A |
| titleOfInvention | Preparation of 2-styrylbenzopyrans |
| abstract | 1370898 Styryl-benzopyrans RICOH KK 23 Dec 1971 [26 Dec 1970] 60125/71 Heading C2C Compounds (I), where X is halogen, NO 2 or CN; Y is halogen, NO 2 , CN or carboxyl; R 1 is hydrogen or C 1-4 alkyl; R 2 is hydrogen or phenyl; R 3 and R 4 are hydrogen, methyl, ethyl or alkoxy; and n and n<SP>1</SP> are 0, 1 or 2 but n and n<SP>1</SP> are not both zero, are made by reacting a compound (II), where Z- is an anion; with methanol in a mixture with benzene and a base. Pyrylium salts (II) may be made by reacting a compound (III) with an acetone derivative R 1 CH 2 COCH 2 R 2 and reacting the intermediate product with an aldehyde V. |
| priorityDate | 1970-12-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.