EP 0975607 A1 20000202 - A PROCESS FOR THE PREPARATION OF HIGHLY PURE 6,7-DICHLORO-5- NITRO-2,3-DIHYDROQUINOXALINE-2,3-DIONE
Title (en)
A PROCESS FOR THE PREPARATION OF HIGHLY PURE 6,7-DICHLORO-5- NITRO-2,3-DIHYDROQUINOXALINE-2,3-DIONE
Title (de)
VERFAHREN ZUR HERSTELLUNG VON HOCHREINEM 6,7-DICHLORO-5-NITRO-2,3-DIHYDROCHINOXALIN-2,3-DION
Title (fr)
PROCEDE DE PREPARATION DE 6,7-DICHLORO-5- NITRO-2,3-DIHYDROQUINOXALINE-2,3-DIONE DE HAUTE PURETE
Publication
Application
Priority
- US 9807966 W 19980420
- US 84447597 A 19970418
Abstract (en)
[origin: WO9847878A1] The present invention provides a process for the production of highly pure 6,7-dichloro-5-nitro-2,3-dihydroquinoxaline-2,3-dione, wherein the crude 6,7-dichloro-5-nitro-2,3-dihydroquinoxaline-2,3-dione is recrystallized from solution of highly polar solvents and water.
IPC 1-7
IPC 8 full level
C07D 241/44 (2006.01)
CPC (source: EP)
C07D 241/44 (2013.01)
Citation (search report)
See references of WO 9847878A1
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU NL PT SE
DOCDB simple family (publication)
WO 9847878 A1 19981029; CA 2286797 A1 19981029; CA 2286797 C 20080715; EP 0975607 A1 20000202; JP 2001522358 A 20011113
DOCDB simple family (application)
US 9807966 W 19980420; CA 2286797 A 19980420; EP 98919820 A 19980420; JP 54625298 A 19980420