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. 04, 1981
Filed:
Oct. 30, 1979
Takashi Matsuo, Itami, JP;
Kazunori Tsushima, Nishinomiya, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
A novel process for producing cyclopentenolones, useful intermediates for producing agricultural chemicals and prostaglandins of the formula (I), ##STR1## wherein R.sub.1 is a hydrogen atom or a lower alkyl group, and R.sub.2 is a hydrogen atom, a lower alkyl, lower alkenyl or lower alkynyl group or a group of the formula, ##STR2## in which R.sub.4 is a hydrogen atom, a methyl group or a halogen atom), --CH.sub.2 --CH.dbd.CH--(CH.sub.2).sub.3 --CO.sub.2 R.sub.5, or --(CH.sub.2).sub.5 --CO.sub.2 R.sub.5 (in which R.sub.5 is a hydrogen atom or a lower alkyl group), but R.sub.1 and R.sub.2 are not a hydrogen atom at the same time, characterized in that said cyclopentenolones are derived from a starting material of the formula (III), ##STR3## through intermediates of the formulae (IV), (V) and (II), ##STR4## Many of the intermediates are novel compounds.