Ethyl 4-amino-1-piperidinecarboxylate → 3-(2-chlorophenyl)-7-(1-ethoxycarbonylpiperidin-4-ylamino)-3,4-dihydropyrimido[4,5-d]pyrimidin-2(1H)-one

Participants

Reaction Conditions

Reaction Steps

Sulfone 9.1 (1.0 g, 2.41 mmol) was taken up in 5 mL ethyl 4-amino-1-piperidinecarboxylate (29 mmol) and stirred at 150° C. After 1 hour, the reaction slurry was cooled to room temperature, poured into 50 mL methanol, and filtered to collect a white solid. The solid was washed with an additional 50 mL methanol and dried in vacuo to yield 0.569 g of 3-(2-chlorophenyl)-7-(1-ethoxycarbonylpiperidin-4-ylamino)-3,4-dihydropyrimido[4,5-d]pyrimidin-2(1H)-one.

Provenance & Evidence