(19)

(11)

EP 0 934 247 A1

(12)

(43) Date of publication: 11.08.1999 Bulletin 1999/32 (21) Application number: 97931894.0 (22) Date of filing: 23.06.1997

(51) International Patent Classification (IPC):  C07C 69/ 712( . ) C07D 335/ 16( . ) C07C 323/ 22( . ) (86) International application number: PCT/GB1997/001690 (87) International publication number: WO 1997/049664 (31.12.1997 Gazette 1998/05)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IT LI NL PT SE (30) Priority: 21.06.1996 GB 19960013114 (71) Applicant: Lambson Fine Chemicals Limited Castleford, West Yorkshire WF13 1LU (GB)	(72) Inventors: ANDERSON, David, George York. YO3 6GZ (GB) DAVIDSON, Robert, Stephen Kent CT2 7NH (GB) CULLUM, Neil, Richard Canterbury, Kent CT2 7NH (GB) (74) Representative: Brierley, Anthony Paul, et al  Appleyard Lees 15 Clare Road Halifax West Yorkshire HX1 2HY Halifax West Yorkshire HX1 2HY (GB)