http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-0789080-B1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2947c7e06e96de67c76fba559dd212ea http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_8e69183fb992892859fad36218688afa |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C12P7-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D319-12 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C59-08 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C12P7-56 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C59-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D319-12 |
| filingDate | 1997-02-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2002-01-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_c6d16a20e99fedb84835bc0cbdd381a1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_a51835610229f6e0c01b8137eaf3d7ec http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ef0b88c655228a60529f86948e3b80c1 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_007216998a45be233a95860232627bd7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_13d65e4ce3d0099eec727538be597fa3 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_901c1a9c514412efab6e16fc4f1b97b9 |
| publicationDate | 2002-01-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | EP-0789080-B1 |
| titleOfInvention | Process for the preparation of organic aminium lactates and their use in the preparation of dilactide |
| abstract | Production of organic aminium lactates or diaminium di-lactates comprises: (a) fermentation of carbohydrate-containing substrates to produce lactic acid; (b) neutralisation of the lactic acid by addition to pH 4.5-13.5 of a non-toxic and non-deactivating amine or diamine; (c) removing suspended substances and part of the dissolved substances from the fermentation medium; (d) concentrating the fermentation medium, and (e) recovering the crystalline racemic, optically active or optically inactive salt from the concentrate. Also claimed are: (1) diaminium di-lactates of formula (V); (2) rac-, D- or L-imidazolium lactate and rac-, D- or L-4-dimethylamino-pyridinium lactate; (3) the production of 1,4-dioxan-2,5-diones (I) by: (i) reacting an a hydroxycarboxylic acid (II) or salt or hydrate in solution with a piperazine derivative (III) or salt (IV); (ii) cyclising the (V) obtained (optionally after working up and recrystallisation at 60-80 degrees C) in the presence of a catalyst at elevated temperature, and optionally (iii) recrystallising the resulting (I). R1, R2 = H or 1-10C alkyl; R3-R10 = H; 1-10C alkyl; 1-10C alkoxy; aryl-1-10C alkyl; aryl optionally substituted by alkyl, alkoxy, aryl, halo, NO2, CN or sulphonyl; allyl; halo; CN; NC; or part of a fused aliphatic, aromatic or heteroaromatic system; X = anion, preferably OH, halo, e.g. Cl, I, Br or F, acetate, HSO4, H2PO4, toluenesulphonate or a group derived from a solvent capable of association, preferably alcoholate, glycolate or alkyl-glycolate; n = 1-16. |
| priorityDate | 1996-02-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 56.