Water → 3-(5-((2-fluoro-4-iodophenyl)amino)-3-(4-methoxybenzyl)-6,8-dimethyl-2,4,7-trioxo-3,4,6,7-tetrahydropyrido[4,3-d]pyrimidin-1(2H)-yl)benzoic acid

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Reaction Steps

A mixture of methyl 3-(5-((2-fluoro-4-iodophenyl)amino)-3-(4-methoxybenzyl)-6,8-dimethyl-2,4,7-trioxo-3,4,6,7-tetrahydropyrido[4,3-d]pyrimidin-1(2H)-yl)benzoate (0.500 g, 0.718 mmol) and LiOH.H2O (0.120 g, 2.87 mmol) in THF (5.0 ml), MeOH (5.0 ml), and Water (5.0 ml) was stirred at room temperature for 17 h. The solvents were evaporated in vacuo and the residue was acidified with 1 N HCl until solid was precipitated. The product was collected by filtration and triturated in pentane, drying of this solid under vacuum afforded titled compound (3d), (0.312 g, 63.7%); which was carried forward for the next step without further purification.

Provenance & Evidence