http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H04198172-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_c999fee6428152a996011d506925c2d7 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D233-72 |
| filingDate | 1990-11-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_88db57cb77f47c1f71402e16dfe37649 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ec09e83c289327abaa42e428c0adf5fc |
| publicationDate | 1992-07-17-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H04198172-A |
| titleOfInvention | Production of hydantoin derivative |
| abstract | PURPOSE: To obtain the subject compound useful as a synthetic intermediate for α-keto acid and amino acid in an easily separable and purifiable state by reacting a ketone or an aldehyde with hydantoin in the presence of a carbonate or a bicarbonate. n CONSTITUTION: The objective compound of formula (R 1 and R 2 are H, 1-10C alkyl or 6-14C aryl; R 1 and R 2 are not H at the same time) can be produced in crystalline form by reacting a ketone or an aldehyde with hydantoin in the presence of a carbonate or a bicarbonate in a solvent (e.g. water-methanol mixture) at 70-120°C for 4-8hr and cooling the reaction liquid. The aldehyde or ketone is used in nearly equivalent amount or 1-1.5 equivalent based on the hydantoin. The carbonate or bicarbonate is selected from sodium carbonate, sodium bicarbonate, potassium carbonate and potassium bicarbonate and used in an amount of 0.3-1.0 equivalent. n COPYRIGHT: (C)1992,JPO&Japio |
| priorityDate | 1990-11-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 27.