[NH2:1][C:2]1[N:7]=[C:6]([C:8]([O:10]C)=[O:9])[C:5](Br)=[CH:4][CH:3]=1.[CH3:13][Sn](C)(C)C.[Li+].[Cl-]>CN(C=O)C.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[NH2:1][C:2]1[N:7]=[C:6]([C:8]([OH:10])=[O:9])[C:5]([CH3:13])=[CH:4][CH:3]=1To methyl 6-amino-3-bromopicolinate (500 mg, 2.2 mmol), tetramethylstannane (900 μL, 6.5 mmol) and LiCl (354 mg, 8.7 mmol) in DMF (6 mL) was added Pd(PPh3)4 (76 mg, 10 mol %). The reaction mixture was heated at 110° C. for 3 h. Additional tetramethylstannane, LiCl and Pd(PPh3)4 were added and heating continued for 6 h. Purification via silica gel chromatography (0-20% MeOH in DCM) gave the title compound.
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