C(=O)([O-])[O-].[Na+].[Na+].[NH2:7][C:8]1[CH:9]=[C:10]2[C:15](=[C:16](Br)[N:17]=1)[N:14]=[CH:13][CH:12]=[CH:11]2.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.[C:38]([C:40]1[CH:41]=[C:42](B(O)O)[CH:43]=[CH:44][CH:45]=1)#[N:39]>C1COCC1>[NH2:7][C:8]1[CH:9]=[C:10]2[C:15](=[C:16]([C:44]3[CH:43]=[CH:42][CH:41]=[C:40]([C:38]#[N:39])[CH:45]=3)[N:17]=1)[N:14]=[CH:13][CH:12]=[CH:11]2To a mixture of THF (80 ml) and 2N sodium carbonate (34 ml, aqueous) is added 6-amino-8-bromo-1,7-naphthyridine (4.007 g), triphenylphosphine (0.37 g) and 3-cyanophenyl-boronic acid (3.23 g). The mixture is degassed under argon three times and then bis(di-benzylidene-acetone)palladium (0) (0.4 g) is added and the mixture is degassed under argon three more times. The mixture is heated at 80° C. under argon for 16 hours then cooled and filtered. The mixture is diluted with ethyl acetate and washed with 2N sodium hydroxide then brine. After drying over sodium sulfate the organic layer is evaporated and suspended in ether. The solid precipitate thus obtained is the title compound, which is filtered off.
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