http://rdf.ncbi.nlm.nih.gov/pubchem/patent/DE-2513997-A1
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_0efa077d881a96aeb1e29b21ef1bbb58 |
| filingDate | 1975-03-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_0ae856e2b30dd08afe967c4fd753d48c http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_91bd9f16b7b05ccfac1e71883ca27330 |
| publicationDate | 1976-10-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | DE-2513997-A1 |
| titleOfInvention | METHOD FOR PRODUCING SULPHAMIC ACID HALOGENIDES |
| abstract | Process for prepg. sulphamoyl halides of formula (I) comprises reacting sulphamic acids (II) or their metal salts with carbonic acid halides in the presence of dichloromethylene ammonium chlorides (III) R1NH, SO3H (II) R2R3N+=CCl2 Cl- (III) R1-NH.SO2X (I) (R1 = aliphatic or cycloaliphatic residue; X = halo; R2 and R3 are each an aliphatic gp. or together complete a heterocycle). Pref. (II) are formed by reacting R1NCO with H2SO4. (I) are starting materials for plant protection agents, dyes and pharmaceuticals e.g. reaction with anthranilic acid then cyclisation of the resulting o-sulphamidobenzoic acid gives 2,1,3-benzothiadiazin-4-one-2,2-dioxides which are herbicides. Compared with the process of the parent patent, this modification gives better yields and purity, and is simpler and less expensive because COCl2, which is cheaper than the other acid chlorides and produces only CO2 and HCl as by-prods. can be used. |
| priorityDate | 1975-03-29-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 171.