Process for the purification of...

C - Chemistry – Metallurgy – 07 – D

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C07D 215/48 (2006.01)

Patent

CA 2068429

Purification of 7-chloroquinoline-8-carboxylic acids I (See formula I) (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.

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