Tributylphosphine → 4-(4-Chloro-2-fluoroanilino)-6-methoxy-7-(1-methylpiperidin-3-ylmethoxy)quinazoline

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Reaction Steps

1,1′-(Azodicarbonyl)dipiperidine (560 mg, 2.2 mmol) was added in portions to a mixture of 4-(4-chloro-2-fluoroanilino)-7-hydroxy-6-methoxyquinazoline (240 mg, 0.75 mmol), (prepared as described for the starting material in Example 2), 1-methyl-3-piperidinemethanol (115 mg, 0.89 mmol) and tributylphosphine (440 mg, 2.2 mmol) in methylene chloride (10 ml). The mixture was stirred for 18 hours, diluted with ether and the resulting precipitate was removed by filtration. The volatiles were removed from the filtrate by evaporation, and the residue was dissolved in acetone and ethereal hydrogen chloride (1.5 ml of a 1M solution, 1.5 mmol) was added. The precipitated product was collected by filtration and purified by column chromatography eluting with methylene chloride/methanol/aqueous ammonia (75/8/1). The purified solid product was triturated with ether collected by filtration and dried to give 4-(4-chloro-2-fluoroanilino)-6-methoxy-7-(1-methylpiperidin-3-ylmethoxy)quinazoline (105 mg, 33%).

Provenance & Evidence