http://rdf.ncbi.nlm.nih.gov/pubchem/patent/CH-536801-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_067fa7a6d043b14968b8dca94aa94e37 |
| classificationCPCAdditional | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C2601-14 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C403-02 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C11B9-003 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-673 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C11B9-00 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-67 |
| filingDate | 1970-12-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_b55895e7fc8f2ca01801af23accf2c83 |
| publicationDate | 1973-05-15-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | CH-536801-A |
| titleOfInvention | Process for the preparation of cyclic ketones |
| abstract | Cyclic ketones (I):- where R1 = 1-5C alkylidene, R = lower alkyl and n = 0, 1, 3 or 4, are made by (a) alkylating cyclohexane-1,3-dione by reacting with an alkyne halide X-(CH2)n-C triple bond R2 where R2 = 1-5C alkylidene rad., X = halogen and n = 0, 1, 3 or 4, (b) reacting the resulting 2-alkynylcyclohexane- 1,3-dione with a halogenating agent; (c) treating the 2-halo-2-alkynyl-cyclohexane-1,3-dione with a mineral or organic base or with an alkali metal salt acting as a base to give a 2-alkynyl-cyclopent-2-one, (d) adding a dialkylmalonate across the double bond of the ketone using a basic catalyst; (e) hydrolosing and then decarboxylating the dialkyl-2-alkynyl-3-oxo-cyclopentylmalonate by treating it with a base followed by an acid, (f) esterifying the resulting 2-alkynyl-3-3xo cyclopentyl acetic acid and (g) partially hydrogenating the ester using a partially poisoned hydrogenation catalyst to give the (I). |
| priorityDate | 1970-12-09-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 75.