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:
Apr. 09, 1985
Filed:
Nov. 28, 1980
Applicant:
Inventors:
Kenji Saito, Toyonaka, JP;
Hiroshi Yamachika, Ibaraki, JP;
Assignee:
Sumitomo Chemical Company, Limited, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568310 ; 568322 ; 568341 ; 568361 ;
Abstract
A process for preparing cyclopentenolones of the formula ##STR1## wherein R.sub.1 is an alkyl group having not more than 6 carbon atoms, an alkenyl or alkynyl group having not more than 6 carbon atoms or a group of the formula: ##STR2## in which R.sub.2 is a hydrogen atom, a methyl group or a halogen atom directly from the corresponding furan-carbinols of the formula: ##STR3## wherein R.sub.1 is as defined above in a single step with an excellent yield, characterized in that the furan-carbinols are treated with water in the presence or absence of a catalyst.