http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-H02235835-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_dcb88e6c103e4974b104452c51fbb4a5 |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C45-59 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D317-20 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C49-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C45-59 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D317-20 |
| filingDate | 1990-02-01-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1ea93eb4ed06591f7907dd73c0443f54 http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_9f06dfc7274f8c6e401fd7d043d6f06c |
| publicationDate | 1990-09-18-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | JP-H02235835-A |
| titleOfInvention | Preparation of 5-chloro-2-pentanone |
| abstract | PURPOSE: To prepare 5-chloro-2-pentanone advantageously by ketalizing a levulinic ester with ethylene glycol, subjecting the resultant ketal to purification by distillation to a specified chlorine content, hydrogenating the purified ketal in the presence of a hydrogenation catalyst preadjusted to an alkaline state, and reacting the resultant product with hydrochloric acid. n CONSTITUTION: A levulinic ester of formula 4 (wherein R is CH 3 , C 2 H 5 , C 3 H 7 , or C 4 H 9 ) is ketalized with ethylene glycol by a known method. The resultant compd. of formula 1 is purified by distillation to a chlorine content of 10 ppm or lower and then is hydrogenated in the presence of a commonly used hydrogenation catalyst pretreated with an alcoholic alkali metal and/or alkaline earth metal hydroxide soln. to give 3-(2-methyl-1,3-dioxolan-2-yl)propan-1-ol of formula 2, which is reacted with hydrochloric acid. Thus is obtd. the objective compd. of formula 3 useful as a medicine precursor substance, etc., at a relative low technical cost without using a high-cost reagent. n COPYRIGHT: (C)1990,JPO |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/JP-2013526532-A |
| priorityDate | 1989-02-02-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 29.