http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-2005054876-A1
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C303-08 |
| classificationIPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-44 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C303-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C309-42 |
| filingDate | 2002-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_48d2a983d666f5a37e62858fb000d99d http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_68e8b5dcfb5b347e88427560936be5ec http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8cb21628982ac03313584a608a89c7a5 |
| publicationDate | 2005-03-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-2005054876-A1 |
| titleOfInvention | Sulphonation of phenols |
| abstract | A process for the preparation of sulphonated phenols of general formula (I) where R 1 is hydrogen, a C 1 -C 20 alkyl group which is unsubstituted or substituted by halogen, cyano, hydroxyl, C 1 -C 20 alkoxy, C 2 -C 20 alkoxycarbonyl, acyloxy and/or phenyl which is unsubstituted or substituted by C 1 -C 4 alkyl, C 1 -C 4 alkoxy and/or halogen, R 2 is hydrogen, C 1 -C 20 alkyl or benzoyl of general formula (II) where R 3 and R 4 independently of one another are each hydrogen, halogen, C 1 -C 12 alkyl, C 1 -C 12 alkoxy, C 1 -C 4 haloalkyl, C 3 -C 8 cycloalkyl, C 4 -C 12 cycloalkylalkyl, cyano, hydroxyl, or hydroxyethyl or are each phenoxy, C 7 -C 10 phenylalkyl or phenyl which is unsubstituted or substituted by C 1 -C 4 alkyl, C 1 -C 4 alkoxy and/or halogen, and R 5 is hydrogen or the group SO 3 X where X can be hydrogen, a monovalent metal or a group —N(R 6 ) 3 , where each of the three radicals R 6 can be independently of one another hydrogen, C 1 -C 6 alkyl or C 1 -C 6 hydroxy alkyl, which process comprises reacting a phenol of general formula (III) where R 1 and R 2 are as defined above, with a halosulphonic acid in a solvent which is a mixture of a C 5 -C 10 aliphatic or cycloaliphatic hydrocarbon and a dialkyl carbonate of general formula (IV) R 7 —O—CO—O—R 8 where R 7 and R 8 each represent independently a C 1 -C 4 alkyl group. |
| priorityDate | 2001-09-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 221.