[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[O:9][C:8]([CH:10]3[CH2:15][CH2:14][NH:13][CH2:12][CH2:11]3)=[N:7][C:6]=2[CH:16]=1.Cl[C:18]1[N:23]=[CH:22][C:21]([F:24])=[CH:20][N:19]=1.C(N(CC)C(C)C)(C)C.CCOC(C)=O.O>C(O)(C)C>[Br:1][C:2]1[CH:3]=[CH:4][C:5]2[O:9][C:8]([CH:10]3[CH2:11][CH2:12][N:13]([C:18]4[N:23]=[CH:22][C:21]([F:24])=[CH:20][N:19]=4)[CH2:14][CH2:15]3)=[N:7][C:6]=2[CH:16]=1Intermediate 5 (1 g, 3.4 mmol) and 2-Chloro-5-fluoropyrimidine was dissolved in isopropanol (20 ml) and added N,N-diisopropylethyl amine (2.4 ml). This mixture was stirred at 90° C. for 90 mins. Isopropanol was removed on rotavapour to obtain a residue. Work up (EtOAc/H2O) followed by purification on combiflash using a gradient mixture of EtOAc and Petether (7:93) as eluent afforded the titled compound as a pink solid.
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