HCID 13670002, compound → HCID 13670004, compound

Participants

Reaction Steps

Dissolved in 20 ml of ethanol was 1.0 g of the 1,4,5,6-tetrahydro-6-ethyl-5-oxo-2-(4-benzylpiperazino)pyrido[4,3-d]pyrimidine obtained in Referential Example 31, followed by an addition of 10% Pd-C. The resultant mixture was stirred at 70° C. for 2.5 hours in a hydrogen atmosphere. After removal of the catalyst by filtration, the filtrate was concentrated to obtain 0.7 g of 1,4,5,6-Tetrahydro-6-ethyl-5-oxo-2-piperazinopyrido[4,3-d]pyrimidine as crystals (yield: 95%).

Provenance & Evidence