http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H02209871-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_2baf849d216e689ecc40ccc931a7a7bc |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D237-04 |
| filingDate | 1989-02-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_6a286c237fd0637149a4838071738afd http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_96b9c5c9b8d126cdc8a243806021caca http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3c601ca4f6a16be2360ac2794b341956 |
| publicationDate | 1990-08-21-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H02209871-A |
| titleOfInvention | Production of 1,4,5,6-tetrahydropyridazine |
| abstract | PURPOSE: To obtain the title compound which is useful as a starting substance for agrochemicals, medicines, dyes, and photography chemicals with industrial advantage by hydrolysis, decarboxylation, oxidation and isomerization of dialkylhexahydropyridazine-1,2-dicarboxylate. n CONSTITUTION: The compound of formula I (R is alkyl, preferably lower alkyl) is hydrolyzed and dehydrogenated in a solvent, preferably water/an alcohol such as methanol, in the presence of an inorganic base, preferably in 4 to 16 equimolar amount of the starting substance at 10 to 100°C, preferably at the refluxing temperature and subsequently subjected to direct oxidation and isomerization preferably using air, oxygen or hydrogen peroxide to enable continuous production of the subject compound of formula II which is especially useful as an intermediate of herbicide through a one-step reaction from an inexpensive and readily available chemical. n COPYRIGHT: (C)1990,JPO&Japio |
| priorityDate | 1989-02-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 26.