Piperazine → Pyrimido(5,4-d)pyrimidin-4-amine, N-methyl-N-(phenylmethyl)-6-(1-piperazinyl)-8-(4-thiomorpholinyl)-, S-oxide

Participants

Reaction Steps

8.1 gm (0.002 mol) of 8-(N-benzyl-methylamino)-2-chloro-4-(1-oxido-thiomorpholino)-pyrimido-[5,4-d]-pyrimidine (m.p.: 158°-160° C.) were refluxed for 30 minutes with 6.9 gm (0.08 mol) of anhydrous piperazine in 150 ml of dioxane. The solvent was then distilled off, and the residue was taken up in about 600 ml of water. After standing for a short time, the reaction product was suction-filtered off, washed with water and dried at about 60° C.

Provenance & Evidence