http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3808232-A
Outgoing Links
| Predicate | Object |
|---|---|
| assignee | http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_b09f893b262cefd50c5e76c4b85d1c0a |
| classificationCPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D311-92 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D311-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D311-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D311-16 |
| classificationIPCInventive | http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D311-18 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D311-16 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D311-08 http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D311-92 |
| filingDate | 1972-07-28-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| grantDate | 1974-04-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor | http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1543fa382a21fdbe6c700bc91cbbdf1b http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_45787d0dd9e1e618a68cde5995459859 |
| publicationDate | 1974-04-30-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber | US-3808232-A |
| titleOfInvention | Process of preparing 4-halomethyl coumarins and compounds |
| abstract | A PROCESS FOR THE PREPARATION OF 4-HALOMETHYL-5-R1 SUBSTITUTED-6-R2 SUBSTUTUTED-7-R3 SUBSTITUTED-8-R4 SUBSTITUTEDCOUMARIN HAVING THE GENERAL FORMULA: 4-(X-CH2-),5-R1,6-R2,7-R3,8-R4-2H-CHROMEN-2-ONE WHEREIN X IS CHLORINE OR BROMINE, R1 IS -H OR -CH3, R2 IS -H, AN ALKYL GROUP HAVING 1 TO 4 CARBON ATOMS, -OH,-OCH3 OR A HALOGEN ATOM, R3 IS -H, AN ALKYL GROUP HAVING 1 TO 4 CARBON ATOMS, -OH, -OCH3 OR A HALOGEN ATOMS, AND R4 IS -H OR -CH3, OR WHEREIN WHEN R1 AND R2 ARE -H OR -CH3, R3 AND R4 CAN FORM A BENZO GROUP, OR WHEREIN R1 AND R2 CAN FORM A BENZO GROUP WHEN R3 AND R4 ARE -H OR -CH3 IS DISCLOSED. THE PROCESS INVOLVES REACTING DIKETENE WITH HALOGEN AT TEMPERATURES BETWEEN -30* AND -10*C. IN A SOLVENT. THE SOLVENT IS INERT TO HALOGEN AND IS NOT MISCIBLE WITH SULFURIC ACID. Y-HALOACETOACETIC HALIDE IS FORMED. THE Y-HALOACETOACETIC HALIDE IS IMMEDIATELY CONVERTED USING A PHENOL TO A CORRESPONDING PHENYL ESTER. THE CORRESPONDING PHENYL ESTER, WITHOUT SEPARATING THE SOLVENT, IS TREATED AT A TEMPERATURE BETWEEN -30* TO + 30*C. WITH CONCENTRATED SULFURIC ACID. TWO PHASES FORM. THE LOWER SULFURIC ACID LAYER IS SEPARATED AND IS HYDROLLIZED WITH AN ICE WATER ADMIXTURE, 4-HALOMETHYL-5-R1 SUBSTITUTED-6-R2 SUBSTITUTED7-R3 SUBSTITUTED-8-R4 SUBSTITUTED COUMARIN RECIPITATES. 4-HALOMETHYL-5-R1 SUBSTITUTED -6-R2 SUBSTITUTED-7-R3 SUBSTITUTED-8-R44 SUBSTITUTED-COUMARIN IS THEN ISOLATED. CERTAIN NEW SUBSTITUTED 4-GALOMETHYL-COUMARINS ARE ALSO DISCLOSED. |
| isCitedBy | http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-3891569-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-RE38723-E http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4749798-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4647666-A http://rdf.ncbi.nlm.nih.gov/pubchem/patent/US-4650881-A |
| priorityDate | 1971-09-03-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type | http://data.epo.org/linked-data/def/patent/Publication |
Incoming Links
Total number of triples: 274.