Methanol → 5-((2-fluoro-4-iodophenyl)amino)-6,8-dimethyl-1-(3-(piperazine-1-carbonyl)phenyl)pyrido[4,3-d]pyrimidine-2,4,7(1H,3H,6H)-trione

Participants

Reaction Steps

Aluminium chloride (1.57 g, 11.76 mmol) was added in small portions to a solution of crude tert-butyl 4-(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)benzoyl)piperazine-1-carboxylate (1 g, 1.176 mmol) in Anisole (5 ml). The resulting reaction mixture was stirred at room temperature for 17 h, methanol (10 ml) was added dropwise and the resulting mixture was concentrated in vacuo. Aq. ammonia was added to the resulting residue and the reaction mixture was extracted several times with DCM. The combined organic phase was washed with brine and dried over sodium sulphate. The solvent was evaporated in vacuo and the residue was purified by column chromatography over neutral alumina to afford the titled compound (23) (0.113 g).

Provenance & Evidence