(19)
(11)
EP 0 912 581 A1
(12)
(43)
Date of publication:
06.05.1999
Bulletin 1999/18
(21)
Application number:
97934027.0
(22)
Date of filing:
30.06.1997
(51)
International Patent Classification (IPC):
C07F
5/
02
( . )
(86)
International application number:
PCT/US1997/011324
(87)
International publication number:
WO 1998/001453
(
15.01.1998
Gazette 1998/02)
(84)
Designated Contracting States:
AT BE CH DE DK ES FR GB GR IE IT LI LU NL PT SE
(30)
Priority:
08.07.1996
US 19960021319P
(71)
Applicant:
Du Pont Pharmaceuticals Company
Wilmington, DE 19898 (US)
(72)
Inventors:
MA, Philip
Chadds Ford, PA 19317 (US)
JIANG, Biao
Shangai 200032 (CN)
(74)
Representative:
Pett, Christopher Phineas, et al
Frank B. Dehn & Co., European Patent Attorneys, 179 Queen Victoria Street
London EC4V 4EL
London EC4V 4EL (GB)
(54)
METHOD FOR PREPARING $g(a)-CHLOROBORONIC ACIDS FROM MANNITOL