The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 14, 1984
Filed:
Sep. 20, 1982
Kenji Saito, Toyonaka, JP;
Hiroshi Yamachika, Ibaraki, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
A method of producing a 4-hydroxycyclopentenone represented by the formula, ##STR1## wherein R.sub.1 is an alkyl, alkenyl, alkynyl, cycloalkyl, thienyl, phenyl, p-methylbenzyl or benzyl group and R.sub.2 is an alkyl, alkenyl or alkynyl group having 6 or less carbon atom, which comprises reacting a furylcarbinol compound of the formula, ##STR2## wherein R.sub.1 is as defined above, in the presence of an acid in a mixed solvent of water and an organic solvent, to obtain a cyclopentenone compound of the formula, ##STR3## wherein R.sub.1 is as defined above; reacting the cyclopentenone compound in the presence of an oxidizing agent to obtain a cyclopentendione compound of the formula, ##STR4## wherein R.sub.1 is as defined above; reacting the cyclopentendione compound with a Grignard reagent of the formula,