(19)

(11)

EP 0 613 456 A1

(12)

(43) Date of publication: 07.09.1994 Bulletin 1994/36 (21) Application number: 92920678.0 (22) Date of filing: 21.09.1992

(51) International Patent Classification (IPC):  C07C 51/ 50( . ) C07C 51/ 487( . ) C07B 57/ 00( . ) C07C 59/ 84( . ) (86) International application number: PCT/US1992/007997 (87) International publication number: WO 1994/006747 (31.03.1994 Gazette 1994/08)

(84) Designated Contracting States: CH DE FR GB IT LI (71) Applicant: ETHYL CORPORATION Richmond Virginia 23219 (US)	(72) Inventors: MANIMARAN, Thanikavelu Baton Rouge, LA 70810 (US) POTTER, Alicia, A. Baton Rouge, LA 70810 (US) (74) Representative: Sandmair, Kurt, Dr. Dr.  Patentanwälte Schwabe, Sandmair, Marx Stuntzstrasse 16 D-81677 München D-81677 München (DE)