http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1326850-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5ddadb999be4f451dfc44d8e359d8f6a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D263-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D405-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D235-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D263-64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D413-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D277-66 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D413-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D263-64 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D263-62 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D417-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D405-14 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D235-20 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D277-66 |
| filingDate | 2001-10-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_fb3789375771337f0a955600feec462a http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_4642ec60956df4d2af77a7133fb59333 |
| publicationDate | 2003-07-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-1326850-A1 |
| titleOfInvention | A process for the preparation of bis-benzazolyl compounds |
| abstract | The present invention provides a process for the preparation of a compound of the formula wherein Y represents -O-, -S- or -N(R<SUB>2</SUB>)-, R<SUB>2 </SUB>being hydrogen, C<SUB>1</SUB>-C<SUB>10</SUB>alkyl or aralkyl; Z represents a 2,5-furanyl, 2,5-thiophenyl, 4,4'-stilbenyl or a 1,2-ethylenyl residue and R<SUB>1 </SUB>represents hydrogen, halogen, C<SUB>1</SUB>-C<SUB>10</SUB>alkyl, C<SUB>1</SUB>-C<SUB>10</SUB>alkoxyl, cyano, COOM or SO<SUB>3</SUB>M, M being hydrogen or an alkaline or alkaline earth metal, characterized by reacting a compound of the formula with a dicarboxylic acid of the formula <?in-line-formulae description="In-line Formulae" end="lead"?>HOOC-Z-COOH (3) <?in-line-formulae description="In-line Formulae" end="tail"?> or an ester thereof, Y, Z and R<SUB>1 </SUB>being as previously defined, in N-methylpyrrolidone or N,N-dimethylacetamide, in the presence of an acidic catalyst and, optionally, in the presence of a secondary solvent capable of removing water from the reaction mixture, which are useful as optical whitening agents for natural and synthetic materials. |
| priorityDate | 2000-10-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
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