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:
Sep. 16, 1986
Filed:
Jun. 27, 1985
Applicant:
Inventors:
Assignee:
Chisso Corporation, Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549274 ;
Abstract
A process for producing 1,3-dioxin-4-one derivatives having a lower alkyl group at 2-position and useful as a starting raw material for prostaglandins, with a high yield is provided, which process comprises reacting formyl Meldrum's acid with a lower aliphatic carbonyl compound of 2 to 4 carbon atoms in a solvent containing the carbonyl compound at 100.degree. to 120.degree. C., while portionwise adding the acid into the solvent, the total quantity of the acid added being 0.2 mol or less per liter of the solvent.