[CH3:1][C:2]([OH:19])([CH3:18])[CH2:3][N:4]1[CH:8]=[C:7](B2OC(C)(C)C(C)(C)O2)[CH:6]=[N:5]1.[Cl:20][C:21]1[N:26]=[C:25](Cl)[CH:24]=[CH:23][N:22]=1.P([O-])([O-])([O-])=O.[K+].[K+].[K+].C1COCC1>O>[Cl:20][C:21]1[N:26]=[C:25]([C:7]2[CH:6]=[N:5][N:4]([CH2:3][C:2]([CH3:1])([OH:19])[CH3:18])[CH:8]=2)[CH:24]=[CH:23][N:22]=1To a mixture of the product from Step 1 (84 mg, 0.31 mmol), 2,4-dichloropyrimidine (47 mg, 0.31 mmol), potassium phosphate, tribasic (167 mg, 0.79 mmol), and 1,1′-bis(diphenylphosphino)ferrocene-palladium(II)dichloride dichloromethane complex (26 mg, 0.031 mmol) was added THF (2 mL) and water (0.2 mL). The mixture was heated to 120° C. for 15 minutes under microwave irradiation, cooled to room temperature, quenched with 1:1 water:brine, and extracted with ethyl acetate. The organic layer was dried over sodium sulfate, filtered, and concentrated. Purification by column chromatography on silica gel (Biotage 10 G, eluting with 0:100 to 100:0 ethyl acetate:hexanes) afforded 1-[4-(2-chloropyrimidin-4-yl)-1H-pyrazol-1-yl]-2-methylpropan-2-ol (44 mg, 0.18 mmol, 56% yield) as a yellow solid. MS ESI: [M+H]+ m/z 253.0.
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