http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-109232301-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C241-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C241-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C241-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C243-06 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C241-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C243-14 |
| filingDate | 2018-10-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2021-01-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2021-01-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-109232301-B |
| titleOfInvention | Preparation method of tetraisopropyl hydrazine |
| abstract | The invention relates to a preparation method of tetraisopropyl hydrazine, under-78 ℃, mixing LDA, a stabilizer and triisopropyl hydrazine in an organic solvent, heating to room temperature, stirring for 2 hours, cooling to-78 ℃, adding CuI and 2-bromopropane, heating to room temperature, continuing stirring until the reaction is finished, and carrying out aftertreatment purification to obtain tetraisopropyl hydrazine; the stabilizer is TMEDA. The method of the invention prepares tetraisopropyl hydrazine by reacting triisopropyl hydrazine with 2-bromopropane in one step in the presence of n-butyl lithium without triisopropyl azo n-hexafluorophosphate. The yield of the two-step reaction of the literature process is only 23%, whereas the yield of the process of the invention is 32%. This new synthesis allows a shorter route of preparation, while avoiding the use of expensive NOPF 6 Thereby greatly reducing the preparation cost of the target compound tetraisopropyl hydrazine. |
| priorityDate | 2018-10-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 52.