EP 0578655 A1 19940119 - METHOD OF PREPARING HALOGENATED INDIGO.
Title (en)
METHOD OF PREPARING HALOGENATED INDIGO.
Title (de)
VERFAHREN ZUR HERSTELLUNG VON HALOGENIERTEM INDIGO.
Title (fr)
PROCEDE DE PREPARATION D'INDIGO HALOGENE.
Publication
Application
Priority
- DE 4110458 A 19910330
- EP 9200612 W 19920319
Abstract (en)
[origin: WO9217547A1] The invention concerns a method for the preparation of halogenated indigo by reacting indigo with bromine and/or chlorine, optionally using iodine as a catalyst, characterized in that thionyl chloride is used as the reaction medium.
Abstract (fr)
Selon un procédé de préparation d'indigo halogéné par réaction d'indigo avec du brome et/ou du chlore, le cas échéant avec de l'iode comme catalyseur, on utilise comme milieu de réaction du chlorure de thionyle.
IPC 1-7
IPC 8 full level
C09B 7/04 (2006.01)
CPC (source: EP US)
C09B 7/04 (2013.01 - EP US)
Citation (search report)
See references of WO 9217547A1
Designated contracting state (EPC)
BE CH DE ES FR GB IT LI
DOCDB simple family (publication)
WO 9217547 A1 19921015; BR 9205812 A 19940628; DE 4110458 A1 19921001; EP 0578655 A1 19940119; EP 0578655 B1 19960731; JP H06506008 A 19940707; US 5380871 A 19950110
DOCDB simple family (application)
EP 9200612 W 19920319; BR 9205812 A 19920319; DE 4110458 A 19910330; EP 92906628 A 19920319; JP 50637392 A 19920319; US 11707593 A 19930914