HCID 56620044, compound → HCID 56637805, compound

Participants

Reaction Steps

Benzyl [(S)-1-[[4-[2-(benzyloxy)-5-cyclopropyl-8-fluoro-1,2,3,5-tetrahydro-1,3-dioxopyrimido[1,6-a]benzimidazol-7-yl]-1-piperazinyl]carbonyl]ethyl]carbamate (127 mg, 0.194 mmol) is dissolved in DMF (15 ml) and hydrogenated over 5 percent Pd/C. After completion of the reduction the catalyst is filtered off and the filtrate is evaporated. The residue is taken up in methanol (50 ml) and treated with active charcoal. After filtering off the charcoal the filtrate is concentrated to a volume of 25 ml. The separated crystals are filtered off. There are obtained 62 mg (84%) of 7-(4-L-alanyl-1-piperazinyl)-5-cyclopropyl-8-fluoro-2-hydroxypyrimido[1,6-a]benzimidazole-1,3(2H,5H)-dione.

Provenance & Evidence