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:
Jan. 10, 1978
Filed:
Oct. 09, 1975
Applicant:
Inventor:
Harold George Haynes, Royston, EN;
Assignee:
Fisons Limited, London, EN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2603 / ; 2606 / ; 2606 / ;
Abstract
4-Hydroxy-benzodioxoles of formula ##STR1## in which R.sup.1 and R.sup.2 are alkyl of 1 to 4 carbon atoms or together represent an alkylene chain of 5 to 7 carbon atoms, which can be converted to pesticides, e.g. by reaction with methyl isocyanate, are prepared by reacting pyrogallol with a ketal of formula ##STR2## in which R.sup.3 and R.sup.4 are alkyl of 1 to 4 carbon atoms, at at least 90.degree. C.