| 摘要 |
<p>PCT No. PCT/EP91/00143 Sec. 371 Date Aug. 3, 1992 Sec. 102(e) Date Aug. 3, 1992 PCT Filed Jan. 25, 1991 PCT Pub. No. WO91/11436 PCT Pub. Date Aug. 8, 1991.Purification of 7-chloroquinoline-8-carboxylic acids I <IMAGE> 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.</p> |
