| Predicate |
Object |
| assignee |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentassignee/MD5_d669af06cb2abbcd6823699582a97002 |
| classificationCPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C67-293
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C69-007
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-32
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07C47-263
http://rdf.ncbi.nlm.nih.gov/pubchem/patentcpc/C07D307-46 |
| classificationIPCInventive |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-20
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C67-293
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-46
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-33
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C47-21
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-58
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-007
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C69-145
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07C47-263
http://rdf.ncbi.nlm.nih.gov/pubchem/patentipc/C07D307-32 |
| filingDate |
1997-10-25-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| inventor |
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_1f277fbd0f570d28ef91389375af96a0
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_76e8706254f725f1959ab9bb4eaab97e
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_635855e98af7684b6612c522cdd5f33b
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_ef1fb1c5c314c627b2db05a2cd664942 |
| publicationDate |
1998-05-20-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| publicationNumber |
DE-19747226-A1 |
| titleOfInvention |
Process for the preparation of alpha-methylene-beta-methyl-gamma-butyrolactone and, as an intermediate, valuable 4-hydroxybutyraldehydes and 2-hydroxy-3-methylene-4-methyltetrahydrofuran |
| abstract |
A method for the preparation of alpha -methylene- beta -methyl- psi -butyrolactone of formula (I) comprises the oxidation of alpha -methylene-3-methyl-4-hydroxybutyraldehyde of formula (II) and/or the tautomer 2-hydroxy-3-methylene-4-methyltetrahydrofuran of formula (III) in the presence of an oxidising agent and then carry out a cyclisation reaction to form (I): HO-CH2-CH(CH3)-C(=CH2)-CHO (II) Also claimed is the preparation of (I) by esterification of 2-methylene-3-methyl-4-acetoxybutyric acid of formula (IV) to form (I) by ring formation: AcO-CH2-CH(CH3)-C(=CH2)-CO2H (IV) |
| priorityDate |
1996-11-07-04:00^^<http://www.w3.org/2001/XMLSchema#date> |
| type |
http://data.epo.org/linked-data/def/patent/Publication |