Triphenylphosphine → 6-(3-(4-Acetylpiperazin-1-yl)propoxy)-4-(4-fluoroindol-5-yloxy)-7-methoxyquinazoline

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Reaction Steps

Diethyl azodicarboxylate (117 μl, 0.738 mmol) was added dropwise to a solution of 4-(4-fluoroindol-5-yloxy)-6-hydroxy-7-methoxyquinazoline (0.2 g, 0.615 mmol), triphenylphosphine (0.242 g, 0.92 mmol) and 3-(4-acetylpiperazin-1-yl)propan-1-ol (0.137 g, 0.738 mmol), (prepared as described for the starting material in Example 1 or Example 7), in methylene chloride (5 ml). After stirring at ambient temperature for 1 hour, triphenylphosphine (0.032 g), 3-(4-acetylpiperazin-1-yl)propan-1-ol (0.022 g) and diethyl azodicarboxylate (20 μl) were added. The mixture was stirred for 1 hour at ambient temperature and evaporated under vacuum. The residue was purified by column chromatography, eluting with increasingly polar mixtures of methylene chloride and ethyl acetate followed by methylene chloride and methanol. The fractions containing the expected product were combined and evaporated. The residue was repurified by preparative LC/MS eluting with increasingly polar mixtures of acetonitrile and water (containing 1% acetic acid). The fractions containing the expected product were combined and evaporated. The residue was triturated under diethyl ether and pentane and the residue was filtered, washed with diethyl ether and dried under vacuum to give 6-(3-(4-acetylpiperazin-1-yl)propoxy)-4-(4-fluoroindol-5-yloxy)-7-methoxyquinazoline (0.057 g, 19%).

Provenance & Evidence