http://rdf.ncbi.nlm.nih.gov/pubchem/patent/GB-754295-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_af99df08b153738cd418446a75d09bfc |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-58 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-093 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C51-00 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-093 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C51-58 |
| filingDate | 1954-08-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationDate | 1956-08-08-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | GB-754295-A |
| titleOfInvention | Preparation of ª -chloro-ª -methyl aliphatic acids and acid chlorides |
| abstract | A method for the production of an a -chloro-a -methyl aliphatic acid or acid chloride of formula <FORM:0754295/IV(a)/1> where R is a straight chain alkyl radical having 1 to 6 carbon atoms, and X is chlorine or hydroxyl, comprises reacting a 1,1,1-trichloro-2-methyl-2-alkanol of formula <FORM:0754295/IV(a)/2> with sulphuric acid of 90 to 106 per cent concentration at a temperature between 10 DEG and 75 DEG C. When preparing the acid chlorides 97 to 106 per cent sulphuric acid is used at a temperature of 10 DEG to 30 DEG C., with the alkanol containing 0.5 to 2 per cent water; when preparing the acids 90 to 97 per cent sulphuric acid is used at a temperature of 20 DEG to 75 DEG C., with the alkanol containing 2 to 5 per cent water, the reaction mixture being diluted with water or ice on completion. The reaction may be carried out in an inert solvent such as petroleum distillates, benzene, toluene, chlorobenzene, carbon tetrachloride, and methylene chloride. In examples, a -chloro-isobutyryl chloride and a - chloro - isobutyric acid are obtained from 1,1,1-trichloro-2-methyl-2-propanol, and a -chloro-a -methyl n - butyryl chloride from 1,1,1 - trichloro - 2 - methyl - 2-butanol. Acid chlorides and acids obtained from 1,1,1 - trichloro - 2 - methyl - 2 - pentanol, -hexanol, and -octanol, are also mentioned. The 1,1,1 - trichloro - 2 - methyl - 2 - alkanols may be obtained by reacting a ketone of formula R-CO-CH3 with chloroform in the presence of a strong base such as potassium hydroxide. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-9617379-B2 http://rdf.ncbi.nlm.nih.gov/pubchem/patent/TW-I583666-B http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-104619679-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CN-105408298-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/EP-2894145-A4 |
| priorityDate | 1953-09-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 53.