Sulfuric Acid → HCID 135983989, compound

Participants

Reaction Conditions

Reaction Steps

5-[2,4-Bis-((S)-3-methyl-morpholin-4-yl)-pyrido[2,3-d]pyrimidin-7-yl]-2-isopropoxy-benzonitrile (1 equiv) was added portionwise to concentrated H2SO4 (0.1 M substrate in acid). The reaction was heated to 90° C. and maintained at this temperature until all starting material had dissolved to give a bright red solution. The mixture was cooled and water (2 reaction volumes) added dropwise, then the solution was neutralized by careful addition of solid NaOH until pH 4-5 was attained. The mixture was cooled and neutralised by addition of 2N NaOH and then extracted using EtOAc (2×10 reaction volumes). The combined extracts were dried (MgSO4), filtered and concentrated in vacuo to give a crude residue which was purified by flash chromatography (SiO2) using MeOH/DCM—0:100 going to 5:95 as eluent to give the desire product as a yellow powder.

Provenance & Evidence