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:
Apr. 27, 1993
Filed:
May. 24, 1989
Marcus Baumann, Basel, CH;
Carl W Mayer, Riehen, CH;
Wolfgang Wernet, Freiburg, DE;
Walter Fischer, Reinach, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
Compounds of the formula I ##STR1## in which R.sup.1 to R.sup.8 independently of one another are H and at least one of R.sup.1 to R.sup.8 is a substituent belonging to the group --F, --Si(C.sub.1 -C.sub.4 alkyl).sub.3 or --COOR.sup.10 ; or each pair of adjacent radicals of R.sup.1 to R.sup.8 is --CO--O--CO--; or at least one of R.sup.1 to R.sup.8 is C.sub.1 -C.sub.20 alkyl--(X).sub.p --, C.sub.2 -C.sub.20 alkenyl--(X).sub.p --, C.sub.2 -C.sub.20 -alkynyl--(X).sub.p --, C.sub.3 -C.sub.8 cycloalkyl--(X).sub.p --, (C.sub.1 -C.sub.12 alkyl--C.sub.3 -C.sub.8 cycloalkyl--(X).sub.p --, C.sub.3 -C.sub.8 -cycloalkyl--CH.sub.2 --(X).sub.p --, C.sub.1 -C.sub.12 alkyl--C.sub.3 -C.sub.8 cycloalkyl--CH.sub.2 --(X).sub.p --, C.sub.6 -C.sub.10 aryl--X--, C.sub.7 -C.sub.20 alkaryl--X--, C.sub.7 -C.sub.12 aralkyl--(X).sub.p -- or C.sub.8 -C.sub.20 --alkaralkyl--(X).sub.p -- or --Y--(C.sub.m H.sub.2m --O)--.sub.n R.sup.10 each of which is unsubstituted or substituted by --F, --OH, --CN, C.sub.1 -C.sub.12 alkoxy, C.sub.1 -C.sub.12 acyloxy or --COOR.sup.10 ; R.sup.10 is H or C.sub.1 -C.sub.18 alkyl, X is --O--, --S--, --SO-- or --SO.sub.2 -- and Y is --O-- or --S--, and p is 0 or 1, m is a number from 2 to 6 and n is a number from 2 to 20; and R.sup.9 is C.sub.1 -C.sub.4 acyl which is unsubstituted or substituted by --F. The compounds are intermediates for the preparation of 5,6,11,12-tetrathiotetracenes which form electrically conducting charge-transfer complexes with electron donors.