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Zhao, Shikui; Zhou, Weicheng
Synthetic communications, 01/2011, Letnik: 41, Številka: 1Journal Article
By S N Ar reaction, poly-halo-quinoline-3-carboxylates such as ethyl 4-chloro-2-cyclopropyl-6,7-difluoro-quinoline-3-carboxylate and ethyl 4-chloro-2-cyclopropyl-5,6-difluoro-quinoline-3-carboxylate were transformed into the 4-phenoxy or 4-phenylthio or 4-(N-methyl)phenylamino-6,7 (or 5,6)-difluoro-quinoline-3-carboxylates or the 4,7-disubstituted, 4,5-disubstituted, 4,6,7-trisubstituted and 4,5,6-trisubstituted products under mild conditions in moderate to excellent yields. Highly regioselective mono- or multi-substitution was observed.
