http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-113461667-B
Outgoing Links
| Predicate | Object |
|---|---|
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D401-12 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D401-12 |
| filingDate | 2021-06-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 2022-03-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 2022-03-22-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CN-113461667-B |
| titleOfInvention | Method for synthesizing nicosulfuron by hydrogen sulfide closed loop |
| abstract | The invention belongs to the technical field of production of nicosulfuron technical materials, and particularly relates to a method for synthesizing nicosulfuron by hydrogen sulfide in a closed loop manner, which comprises the following steps: tetramethoxypropane is reacted with ethyl cyanoacetate to generate 1-cyano-4-methoxy-1-ethoxycarbonyl-1, 3-butadiene (cyanoalkene for short, the same below); reacting cyanoalkene with hydrogen sulfide to generate 2-mercapto ethyl nicotinate (mercapto compound for short, the same below) through ring closure; reacting the mercapto compound with dimethylamine, and then carrying out oxychlorination reaction to obtain sulfonyl chloride; performing ammonolysis reaction on sulfonyl chloride and ammonia gas to obtain sulfonamide; and reacting the sulfamide with light fixing and pyrimidinamine to obtain the nicosulfuron. The method for synthesizing nicosulfuron by hydrogen sulfide ring closure has the advantages of mild and controllable reaction steps, simple process equipment, low production cost, good product quality, reduction of three wastes, energy conservation, improvement of production environment and contribution to realizing the aim of carbon neutralization. |
| priorityDate | 2021-06-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 78.