4-Amino-1-methylpiperidine → Ammonium Hydroxide

Participants

Reaction Steps

3-[8-(2,6-difluorophenyl)-2-(methylsulfonyl)-7-oxo-5,6,7,8-tetrahydropyrimido[4,5-d]pyrimidin-4-yl]-N,4-dimethylbenzamide, (0.02 g, 0.041 mmol) was dissolved in THF (5 mL) and 1-methyl-4-piperidinamine (0.024 g, 0.21 mmol) was added. The reaction mixture was stirred at room temperature for 24 hours, but the reaction had not gone to completion. The reaction was heated to 45° C. for 24 h and then cooled to room temperature. The solvents were pumped off in vacuo, and the residue was flash chromatographed on silica gel (10 g) eluted with CH2Cl2 to 6:0.5:0.05, CH2Cl2:ethanol:NH4OH to give the title compound as a white amorphous solid. mp (dec) 205-209° C. LC-MS m/z 522 (M+H)+, 1.29 min (ret time).

Provenance & Evidence