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. 22, 1983
Filed:
Oct. 22, 1981
Applicant:
Inventor:
Avinash C Mehta, Belmont, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07C / ; C07C / ;
U.S. Cl.
CPC ...
549415 ; 568746 ; 568643 ; 568592 ; 568331 ; 568 49 ; 568 47 ; 560255 ; 560108 ; 549472 ; 260463 ;
Abstract
The present invention relates to novel biphenyl compounds of the formula ##STR1## wherein one of R.sup.1 and R.sup.2 is hydrogen and the other is --CH.sub.3-m X.sub.m wherein X is chloro or bromo and m is an integer one or two, and the cyclic moiety A is a -2,5-; -2,3-; or -3,4-di-OR-1-phenyl moiety wherein R is a hydroxy-protecting group and to a method of preparing same. The biphenyl compounds are useful as intermediates in preparing redox compounds containing a phenylhydroquinone or phenylcatechol moiety.