(19)

(11)

EP 0 502 154 A1

(12)

(43) Date of publication: 09.09.1992 Bulletin 1992/37 (21) Application number: 91916316.0 (22) Date of filing: 11.09.1991

(51) International Patent Classification (IPC):  C07C 69/ 017( . ) C07C 69/ 90( . ) C09K 19/ 20( . ) C07C 69/ 76( . ) C07C 69/ 92( . ) C09K 19/ 30( . ) (86) International application number: PCT/EP1991/001727 (87) International publication number: WO 1992/005230 (02.04.1992 Gazette 1992/08)

(84) Designated Contracting States: DE GB (30) Priority: 26.09.1990 EP 19900118432 22.04.1991 EP 19910106411 (71) Applicant: MERCK PATENT GmbH D-64271 Darmstadt (DE)	(72) Inventors: COATES, David 87 Sopwith Crescent Merley Dorset BH21 3SW (GB) CLEMITSON, Robert, William Poole BH14 9QF (GB) HITTICH, Reinhard D-6101 Modautal 1 (DE) REIFFENRATH, Volker D-6101 Ro dorf (DE) PLACH, Herbert D-6101 Darmstadt (DE) GREENFIELD, Simon 2 Blackbird Close Poole BH17 7YA (GB)