Trifluoroacetic acid → (R)-1-(4-(6-(5-isopropyl-2-methylphenyl)-2-(3-methyl-1-tosyl-1H-indol-4-yl)-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidin-4-yl)-3-methylpiperazin-1-yl)ethanone

Participants

Reaction Steps

The TFA salt of (R)-6-(5-isopropyl-2-methylphenyl)-2-(3-methyl-1-tosyl-1H-indol-4-yl)-4-(2-methylpiperazin-1-yl)-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidine (62 mg, 0.095 mmol) was dissolved in DCM (5 mL) and acetic anhydride (0.014 mL, 0.143 mmol) and DIEA (0.133 mL, 0.764 mmol) were added. The reaction was stirred at rt for 45 min and diluted with EtOAc, and washed successively with sat NaHCO3 and brine. The organic layer was then dried over Na2SO4 and filtered. After concentration, the resulting residue was purified by FCC (60-90% EtOAc/heptane) to provide (R)-1-(4-(6-(5-isopropyl-2-methylphenyl)-2-(3-methyl-1-tosyl-1H-indol-4-yl)-5,6,7,8-tetrahydropyrido[4,3-d]pyrimidin-4-yl)-3-methylpiperazin-1-yl)ethanone. MS (ESI+) m/z 691.4 (M+H)+.

Provenance & Evidence