Triphenylphosphine → HCID 5329030, compound

Participants

Reaction Conditions

Reaction Steps

Diethyl azodicarboxylate (218 mg, 1.25 mmol) was added dropwise to a solution of 4-(4-chloro-2-fluoroanilino)-7-hydroxy-6-methoxyquinazoline (159 mg, 0.5 mmol), (prepared as described for the starting material in Example 2), 4-hydroxy-1-methylpiperidine (115 mg, 1 mmol) and triphenylphosphine (328 mg, 1.25mmol) in methylene chloride (5 ml) cooled at 5° C. under nitrogen. The mixture was stirred for 1 hour at ambient temperature, the solvent was removed by evaporation and the residue was partitioned between 2M hydrochloric acid and ether. The aqueous layer was separated, adjusted to pH9 with aqueous sodium hydrogen carbonate solution and extracted with methylene chloride. The methylene chloride layer was washed with brine, dried (MgSO4) and the solvent removed by evaporation. The residue was purified on neutral alumina eluting with methylene chloride/methanol (97/3). The purified product was triturated with ether, collected by filtration and dried to give 4-(4-chloro-2-fluoroanilino)-6-methoxy-7-(1-methylpiperidine-4-yloxy)quinazoline (180 mg, 79%).

Provenance & Evidence