Global Patent Index - EP 0975607 A1

EP 0975607 A1 2000-02-02 - 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

EP 0975607 A1 (EN)

Application

EP 98919820 A

Priority

  • US 9807966 W
  • US 84447597 A

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 (main, further and additional classification)

C07D 241/44

IPC 8 full level (invention and additional information)

C07D 241/44 (2006.01)

CPC (invention and additional information)

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

EPO simple patent family

WO 9847878 A1 19981029; CA 2286797 A1 19981029; CA 2286797 C 20080715; EP 0975607 A1 20000202; JP 2001522358 A 20011113

INPADOC legal status


2004-09-29 [18D] DEEMED TO BE WITHDRAWN

- Effective date: 20040330

2003-11-05 [17Q] FIRST EXAMINATION REPORT

- Effective date: 20030918

2000-02-02 [17P] REQUEST FOR EXAMINATION FILED

- Effective date: 19991018

2000-02-02 [AK] DESIGNATED CONTRACTING STATES:

- Kind Code of Ref Document: A1

- Designated State(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU NL PT SE