Water → tert-butyl 3-[({4-[(1-{2-[(3-fluorophenyl)amino]-2-oxoethyl}-1H-pyrazol-4-yl)amino]quinazolin-7-yl}oxy)methyl]pyrrolidine-1-carboxylate

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A mixture of N-(3-fluorophenyl)-2-{4-[(7-hydroxyquinazolin-4-yl)amino]-1H-pyrazol-1-yl}acetamide (0.59 g, 1.2 mmol), cesium carbonate (1.95 g, 6.0 mmol) and tert-butyl 3-{[(methylsulphonyl)oxy]methyl}pyrrolidine-1-carboxylate (assumed 1.3 mmol) in dimethyl acetamide (10 ml) was heated at 80° C. for 6 hours. The mixture was poured into water and extracted with ethyl acetate. The organic layer was separated, washed with brine, dried over magnesium sulphate and evaporated in vacuo. The residue was purified by silica gel chromatography eluting with 4 to 7% methanol in dichloromethane to yield tert-butyl 3-[({4-[(1-{2-[(3-fluorophenyl)amino]-2-oxoethyl}-1H-pyrazol-4-yl)amino]quinazolin-7-yl}oxy)methyl]pyrrolidine-1-carboxylate (0.435 g, 65% yield): MS (+ve ESI): 562 (M+H)+.

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