http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-606195-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d202e9e866984fe229f6facc38f1d740 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D333-36 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D333-36 |
| filingDate | 1945-09-04-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1948-08-10-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-606195-A |
| titleOfInvention | Improvements in and relating to thiophene compounds and processes of preparing the same |
| abstract | 2-(41-Carboxybutyl)-3 : 4-diamino-tetrahydrothiophene and mineral acid salts thereof are obtained by the hydrolysis of a compound of the formula <FORM:0606195/IV(b)/1> wherein R and R1 are different acyl groups and R11 is an alkyl, aryl or aralkyl group, preferably by means of aqueous alkali, followed by acidification of the hydrolysis mixture with a mineral acid. The corresponding free base is obtained by treating the mineral acid salt with alkali. Among the compounds which may be used as starting materials are 2-(41-carboethoxybutyl)-, 2-(41-carbomethoxybutyl)-2-(41-carbopropoxybutyl)-, 2 - (41 - carbobenzoxybutyl)-, 2 - (41 - carbophenoxybutyl) - 3 - acetamido - 4 - benzamido or 3-benzamido-4-acetamido-tetrahydrothiophene and the corresponding 3-propamido-4-benzamido compounds. In examples: (1) dl-cis-2-(41-carbomethoxybutyl)-3-acetamido - 4 - benzamido - tetrahydrothiophene is hydrolysed with barium hydroxide, the reaction mixture being acidified with sulphuric acid to produce the acid sulphate of dl-cis-2-(41-carboxybutyl)-3 : 4-diamino-tetrahydrothiophene; (2) dl-trans-epiallo-2-(41-carboxybutyl)-3 : 4-diamino-tetrahydrothiophene acid sulphate is produced as in (1) using the corresponding dl-trans-epiallo-compound as starting material; (3) as in (1), but using hydrochloric and hydrobromic acids instead of sulphuric; (4) as in (1) using the p dl-trans-allo-compound as starting material. Specifications 606,194 and 606,196 are referred to. |
| priorityDate | 1944-09-16-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 20.