(19)

(11)

EP 0 725 780 A1

(12)

(43) Date of publication: 14.08.1996 Bulletin 1996/33 (21) Application number: 94932004.0 (22) Date of filing: 24.10.1994

(51) International Patent Classification (IPC):  C07D 317/ 12( . ) C07D 323/ 06( . ) C07D 323/ 00( . ) (86) International application number: PCT/US1994/012165 (87) International publication number: WO 1995/011892 (04.05.1995 Gazette 1995/19)

(84) Designated Contracting States: DE FR GB (30) Priority: 25.10.1993 US 19930143008 (71) Applicant: HOECHST CELANESE CORPORATION Somerville, N.J. 08876 (US)	(72) Inventors: YOUNG, Daryl, A. Corpus Christi, TX 78413 (US) STAUTZENBERGER, Adin, L. Corpus Christi, TX 78411 (US) YEARWOOD, Michael, G. Bishop, TX 78343 (US) (74) Representative: De Minvielle-Devaux, Ian Benedict Peter, et al  CARPMAELS & RANSFORD 43, Bloomsbury Square London WC1A 2RA London WC1A 2RA (GB)