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(11)

EP 0 614 453 A1

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(43) Date of publication: 14.09.1994 Bulletin 1994/37 (21) Application number: 93920413.0 (22) Date of filing: 27.08.1993

(51) International Patent Classification (IPC):  C07B 61/ 00( . ) C07C 29/ 38( . ) C07C 29/ 141( . ) C07C 31/ 22( . ) (86) International application number: PCT/US1993/008140 (87) International publication number: WO 1994/007831 (14.04.1994 Gazette 1994/09)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 25.09.1992 US 19920950524 (71) Applicant: Aristech Chemical Corporation Pittsburgh, PA 15230-0250 (US)	(72) Inventors: SALEK, Jeffrey, S. Oakdale, PA 15071 (US) PUGACH, Joseph Monroeville, PA 15146 (US) ELIAS, Carole, L. New Kensington, PA 15068 (US) CULLO, Leonard A. Maplewood Terrace, Greensburg, PA 15601 (US) (74) Representative: Grünecker, Kinkeldey, Stockmair & Schwanhäusser Anwaltssozietät  Maximilianstrasse 58 D-80538 München D-80538 München (DE)