CCN(C(C)C)C(C)C.[CH3:10][C:11]1[N:16]=[C:15]([C:17]([OH:19])=O)[CH:14]=[CH:13][CH:12]=1.F[P-](F)(F)(F)(F)F.N1(OC(N(C)C)=[N+](C)C)C2N=CC=CC=2N=N1.[Br:44][C:45]1[CH:46]=[C:47]([NH2:56])[C:48]2[CH:49]=[N:50][N:51]([CH2:54][CH3:55])[C:52]=2[CH:53]=1>CN(C=O)C>[Br:44][C:45]1[CH:53]=[C:52]2[C:48]([CH:49]=[N:50][N:51]2[CH2:54][CH3:55])=[C:47]([NH:56][C:17]([C:15]2[CH:14]=[CH:13][CH:12]=[C:11]([CH3:10])[N:16]=2)=[O:19])[CH:46]=1DIPEA (0.161 ml, 0.93 mmol) was added to 6-methyl-2-pyridinecarboxylic acid (available from Fluorochem, 51 mg, 0.37 mmol) and O-(7-azabenzotriazol-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate (174 mg, 0.46 mmol) in DMF (3 ml). The reaction was stirred for 30 mins under nitrogen then 6-bromo-1-ethyl-1H-indazol-4-amine (100 mg, 0.42 mmol) was added and the reaction was stirred overnight. The solvent was evaporated and water (5 ml) was added before extraction into DCM (2×20 ml). The compound was loaded onto an aminopropyl cartridge (20 g), eluted with 10% MeOH in DCM and evaporated to dryness. The residue was purified by silica chromatography, eluting with 0-50% ethyl acetate in DCM over 60 mins. Appropriate fractions were evaporated to give the title compound (107 mg).
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