3-Fluoroaniline → 2-{3-[(7-{2-[1-(2-tert-butoxyethyl)piperidin-4-yl]ethoxy}-6-methoxyquinazolin-4-yl)amino]-1H-pyrazol-5-yl}-N-(3-fluorophenyl)acetamide

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Reaction Steps

{3-[(7-{2-[1-(2-tert-butoxyethyl)piperidin-4-yl]ethoxy}-6-methoxyquinazolin-4-yl)amino]-1H-pyrazol-5-yl}acetic acid (210 mg, 0.4 mmol) in dimethylformamide (2.1 ml) was reacted with 3-fluoroaniline (58 mg, 0.52 mmol) in the presence of 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (107 mg, 0.56 mmol) and 2-hydroxypyridine-1-oxide (53 mg, 0.48 mmol) at 55° C. for 1.5 hours. The reaction mixture was cooled, diluted with dichloromethane (7 ml) and purified by chromatography on silica gel. Elution with dichloromethane:methanol (9:1) and increased polarity to dichloromethane:methanol:ammonia (9:1:0.1) yielded 2-{3-[(7-{2-[1-(2-tert-butoxyethyl)piperidin-4-yl]ethoxy}-6-methoxyquinazolin-4-yl)amino]-1H-pyrazol-5-yl}-N-(3-fluorophenyl)acetamide (162 mg, 65% yield) as a light pink solid:

Provenance & Evidence