http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-1305326-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_295e7262a2d9d9a3faa3f52748dbd03d |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07H13-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07H13-04 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07H13-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/B01J31-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07H13-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07H13-04 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07B61-00 |
| filingDate | 2001-07-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_86e298b50ef179accb1e4064267796ac http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_8dd2106366b2f7e948fd839d3ffd5839 |
| publicationDate | 2003-05-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-1305326-A1 |
| titleOfInvention | An improved method for the synthesis of sucrose-6-esters |
| abstract | There is described a process for the synthesis of a sucrose-6-ester comprising: (a) reacting a mixture comprising sucrose and a polar aprotic solvent with an organotin-based acylation promoter, while adding a solvent capable of removing water by co-distillation, and removing water by co-distillation, to afford a first reaction mixture which is substantially free from water, followed by (b) adding a carboxylic anhydride to said first reaction mixture to afford a second reaction mixture, and maintaining said second reaction mixture at a temperature and for a period of time sufficient to produce a sucrose-6-ester, characterised in that step (a) is performed at a temperature of from 85 to 125° C. and at a pressure of from 20 to 80 kPa. In the most preferred embodiment, the polar aprotic solvent is DMF, the solvent capable of removing water by co-distillation is cyclohexane, the organotion-based acylation promoter is a 1,3-diacyloxy-1,1,3,3-tetrabutyldistannoxane, and step (a) is performed at approximately 97° C., and approximately 50 kpa, until the weight ratio of tin to water in the first reaction mixture is greater than about 26, when the tin content is measured by X-Ray Fluoresence Analyzer, and the water content is measured by the Karl-Fischer method. |
| priorityDate | 2000-07-31-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 54.