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:
Nov. 27, 1990
Filed:
Aug. 15, 1989
Rainer Becker, Bad Durkheim, DE;
Werner Hoffmann, Neuhofen, DE;
Heinz-Guenter Oeser, Dirmstein, DE;
Wolfgang Rohr, Wachenheim, DE;
Juergen Varwig, Heidelberg, DE;
BASF Aktiengesellschaft, Ludwigshafen, DE;
Abstract
Diethers of m- or p-hydroxyphenol, as well as the monoethers, are prepared by reacting m- or p-tert.-butoxyphenol of the formula II ##STR1## with a halogen compound in the presence of a hydroxide, carbonate and/or bicarbonate of an alkali metal or alkaline earth metal and an organic solvent which is inert under the reaction conditions, at from 20.degree. C. to 150.degree. C., and, if desired, reacting the resulting diether with a dilute aqueous inorganic acid at from 30.degree. to 100.degree. C. to give the monoether. The end products which can be prepared by the process according to the invention are useful starting materials for the preparation of dyes, drugs and crop protection agents.