Liu Zhe
2001
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0
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Journal
Chinese New Drugs Journal
Abstract
The 1-cyclopropyl-6,7-difluoro-8-methyl-1,4-dihydro-4-oxoquinoline-3-ethyl carboxylate was prepared by acyl-chlorination,condensation,decarboxylation,estherification,cyclopropylamine replacement and cyclization of 3-methoxyl-2,4,5-trifluorobenzoic acid with an overall yield of 48%.