http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4830788-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_5b06af1761572753ab9ef3ea61409458 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07F9-3808 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07F9-38 |
| filingDate | 1987-11-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1989-05-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_e6a5adf2a639b48930ce99bcf2500348 |
| publicationDate | 1989-05-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-4830788-A |
| titleOfInvention | Process for preparation of substituted-aminomethylphosphonic acids |
| abstract | A process is disclosed for the preparation of N-substituted aminomethylphosphonic acids, particularly methylaminomethylphosphonic acid, in high yield and purity with related low production cost using conventional equipment, which comprises the steps of (a) reacting an N-substituted amide with paraformaldehyde in a low molecular weight carboxylic acid to form the N-methylol derivative, (b) reacting the N-methylolamide with PCl 3 i n excess low molecular weight carboxylic acid and heating to form the phosphonomethyl derivative, (c) hydrolyzing acid chloride and acid anhydride with water, (d) distilling off the low-molecular weight carboxylic acid, (e) hydrolyzing the N-acyl group with water and strong acid catalyst, (f) adding low molecular weight alcohol to crystallize the N-substituted-aminomethylphosphonic acid and (g) filtering, and washing the product. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5324855-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-5041627-A |
| priorityDate | 1987-11-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 116.