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:
Oct. 06, 1987
Filed:
Sep. 19, 1986
Applicant:
Inventors:
Naotake Takaishi, Utsunomiya, JP;
Kimihiko Hori, Utsunomiya, JP;
Assignee:
Kao Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
549305 ;
Abstract
A novel process for preparing a 3-phenacylidene phthalide of the general formula (II) ##STR1## which comprises reacting a halogenating reagent with a 2-carboxydibenzoylmethane. The 2-carboxydibenzoylmethane can be inexpensively prepared, so that the 3-phenacylidene phthalides which are useful as a growth regulant for plants and a safering agent to reduce herbicidal injury to plants can be readily obtained economically in high yield.