http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-3941562-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D209-48 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D209-48 |
| filingDate | 1989-12-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_96887a2e8a08cfb7ec641f3a030b06d3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_824d79fd2e12c85ff7de5c477d461c57 |
| publicationDate | 1991-06-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-3941562-A1 |
| titleOfInvention | METHOD FOR PRODUCING OLEFINICALLY UNSATURATED COMPOUNDS |
| abstract | Prepn. of olefinic cpds. of formula (I) comprises: (a) reaction of a phosphonium salt of formula (V) dissolved n a 1-6C alcohol, with a base and elemental bromine to give a Br-contg. phsophonium slat of formula (III) or a Br-contg. phsophorous of formula (IV); and (b) reaction of a ketone of formula (II) with (III) and a base or with (IV), in a solvent. R1 = an organic gp; R2 = an orgnaic gp. or H; A = COR3, COOR3, CONR3R4 or CN; R3, R4 = an organic gp; X = an anion of a strong acid. The prepn. of (IV) in a 1-6C alcohol is claimed per use. USE/ADVANTAGE - Some +-bromo-substd. cinnamic acid derivs. or vinyl ketones prepd. by this process, e.g. N-(3-(methyl-+-bromo acrylate)-4-chlorophenyl) -3,4,5,6-tetrahydronaphthalimide (Ia) are herbicidally active or are intermediates in herbicide prepn. Previous prepns. of (III) and (IV) took place in solvents, e.g. C6H6, CH3COOH, which are unsuited to Wittig-style reactions or are toxic. |
| priorityDate | 1989-12-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 59.