Br[C:2]1[N:7]=[CH:6][C:5]([NH2:8])=[CH:4][CH:3]=1.[F:9][C:10]1[CH:11]=[N:12][CH:13]=[C:14]([F:29])[C:15]=1[Sn](CCCC)(CCCC)CCCC>>[F:9][C:10]1[CH:11]=[N:12][CH:13]=[C:14]([F:29])[C:15]=1[C:2]1[CH:3]=[CH:4][C:5]([NH2:8])=[CH:6][N:7]=1Obtained (50% yield) following the procedure described in example 34 (step A), starting with 6-bromopyridin-3-amine and 3,5-difluoro-4-(tributylstannyl)pyridine.
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