Process for the purification of 7-chloroquinoline-8-carboxylic acids

US5310915A · kind A · utility

Assignee

• BASF SE

Inventors

• Gernot Reissenweber · Haßloch, DE
• Knut Koob · Mutterstadt, DE
• Winfried Richarz · Riedstadt, DE

Key dates

• Filing date: Aug 3, 1992
• Grant date: May 10, 1994
• Expiry date: Aug 3, 2012

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07D215/48
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

Purification of 7-chloroquinoline-8-carboxylic acids I ##STR1## (X=H, halogen, lower alkyl group) by recrystallization from lower alcohols which are miscible with water, by carrying the recrystallization in the presence of small amounts of a base. The quinolinecarboxylic acids I are valuable crop protection agents.