http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-2923706-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_be1b623d6acbd4d8ffcca016f6adffd2 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D241-16 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D241-16 |
| filingDate | 1979-06-12-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b90ac3eee5b482caef1fee4a770d0012 |
| publicationDate | 1980-01-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-2923706-A1 |
| titleOfInvention | METHOD FOR PREPARING 2,6-DICHLORPYRAZINE AND PRODUCT OBTAINED thereby |
| abstract | Synthesis of 2,6-dichlorpyrazine (I) from monochloropyrazine (II) comprises (a) cold mixing (II) with (I) in such an amt. that the total concn. of (II) is 10-80%; (b) heating this mixt. to 70 degrees C; (c) leading gaseous Cl2 into the mixt. at 60-140 degrees C until the end of the reaction; and (d) isolating the (I). (I) is used in the synthesis of pharmaceutical and zootechnical sulphonamides, esp. 2-sulphanilidamide-6-chloropyrazine. (I) is used as the solvent; this eliminates the formation of any prods. from side reactions of the solvent e.g. in a previous process using organic solvents and only a little water, HCl quickly formed and reacted with the solvents to give chlorohydrate-contg. solids which blocked the appts. Conversion of (II) into (I) is complete, with the exception of small amts. of 2,3-dichloropyrazine (2-3%). |
| priorityDate | 1978-06-26-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 30.