http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5659035-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_32e64a7b278c8322dc5c8af6d2a72e25 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F9-5532 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-568 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-553 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-59 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-572 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-576 |
| filingDate | 1994-12-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1997-08-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_f7042717eaaa5d9e5763d02d932b21b7 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_92d008edccae8583c66b6b2d1d8195eb |
| publicationDate | 1997-08-19-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-5659035-A |
| titleOfInvention | Substituted phosphonic acids |
| abstract | A method for the production of azacycloalkane-2,2-diphosphonic acids of general formula; ##STR1## where n is a whole number of from 2 to 16, Y is H, an alkyl or alkenyl, a substituted alkyl, or an aryl, such that the group "Y" remains unchanged during the reaction, n by reaction of a lactam with a phosphorus trihalide in the presence of phosphorous acid and/or water, in which the reaction mixture also includes an organic amine and/or or an organic amine salt, said reaction being followed by hydrolysis of the reaction mixture and purification of the reaction product to obtain the diphosphonic acid. n The method is exemplified by the preparation of azacycloheptane-2,2-diphosphonic acid, and azacyclononane-2,2-diphosphonic acid. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-6878846-B2 |
| priorityDate | 1993-12-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 49.