(19)

(11)

EP 0 442 973 A1

(12)

(43) Date of publication: 28.08.1991 Bulletin 1991/35 (21) Application number: 90901137.0 (22) Date of filing: 27.10.1989

(51) International Patent Classification (IPC):  C07D 277/ 04( . ) (86) International application number: PCT/US1989/004827 (87) International publication number: WO 1990/005725 (31.05.1990 Gazette 1990/12)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 14.11.1988 US 19880270913 (71) Applicant: ICI AMERICAS INC. Richmond, CA 94804-0023 (US)	(72) Inventors: KERLINGER, Nancy Lafayette, CA 94549 (US) GLESS, Richard, D. Oakland, CA 94602 (US) (74) Representative: Downes, John Edward  ICI Group Patents Services Dept. PO Box 6 Shire Park Bessemer Road Welwyn Garden City Herts, AL7 1HD Welwyn Garden City Herts, AL7 1HD (GB)