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:
Feb. 10, 1987
Filed:
Nov. 07, 1985
Applicant:
Inventors:
Assignee:
Takeda Chemical Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07F / ;
U.S. Cl.
CPC ...
558 83 ; 558 86 ;
Abstract
A method is provided for producing a 1,3,2-dioxaphosphole of the formula ##STR1## wherein ##STR2## respresents a benzene ring which may be substituted and R represents an aryl, alkoxy or aralkyloxy group which may be substituted, which comprises reacting a catechol compound of the formula ##STR3## wherein ##STR4## is an defined above, with a compound of the formula ##STR5## wherein X is a halogen atom and R is as defined above, at a temperature not higher than about 30.degree. C. in the presence of a base.