http://rdf.ncbi.nlm.nih.gov/pubchem/patent/SU-1468896-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_207df4ef150850875d3bd4ca6f9508e8 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C25-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C17-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C25-125 |
| filingDate | 1987-05-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1989-03-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ad3b99f6525888eccb7c0a3d31bcd867 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_29dd25472465c458ede9e5b64bd691a4 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_eb4d59d7987530dcf1b7a2719fd1ee33 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a702f73bbfcf8d69ab2b04128f8a6379 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_40bfa2d563dcabd2548636c4e86f4dfb |
| publicationDate | 1989-03-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | SU-1468896-A1 |
| titleOfInvention | Method of producing bromobenzene or alkylbromobenzene |
| abstract | The invention relates to halogen-containing compounds, in particular to the preparation of bromobenzene or alkyl. Br-F: - bromobenzene of the formula, -CR2, where R, is methyl at,, or, methyl at R ,, shl and R ,. R, is methyl at, or R, R4 is methyl at. 1 Rf-tnsh at, HHH The invention relates to methods for producing bromobenzene or alkyl bromo-benzene of the general formula Hz R. Where methyl at, or methyl at R, R4-H, or R methyl at RJ-H, used in organic synthesis. The goal is to increase the yield of the target product and simplify the technology. The preparation is carried out by treating the corresponding aromatic hydrocarbon NaBr or KBG in the presence of sodium hypochlorite or the molar ratio 1: (1-1.3) (1-1.3). The process is carried out at 20-40 ° C in an acidic medium. : in the presence of 15-36.5% aqueous HC1 with a molar ratio of acid and hydrocarbon of 1-1.3: 1 or in the presence of 15-96%. at a molar ratio of acid and hydrocarbon of 0.5-0.65: 1. The aqueous solution of sodium hypochlorite is carried out gradually over a period of 2-4 hours, then the reaction mixture is kept for 3-5 hours. The yields of the target products are increased by a value from 10 (monobromo-o-xylene) to 14-20% (bromine toluene, others bromoxylenes), the process is simplified by eliminating toxic HBr. 1 tab. Rj is methyl at, or methi at, -H, or R, is ethyl at, or R, R2, methyl at RJ-H, used as intermediates in organic synthesis. The purpose of the invention is to increase the yield of the target product and simplify the technology. Example. 13.4 g (0.13 mol) of crystalline NaBr are placed in a three-neck flask at 35 C, and then with vigorous stirring of the reaction S (L c C) 00; o O) |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/WO-2005061423-A1 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105669364-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-100398500-C |
| priorityDate | 1987-05-11-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 62.