HCID 118598903, compound → HCID 118598605, compound

Participants

Reaction Steps

To a stirred solution of benzyl 1,5-dioxo-6-(pyrimidin-4-ylamino)-2,5-dihydro-1H-spiro[imidazo[1,5-a]pyridine-3,3′-pyrrolidine]-1′-carboxylate (5, 0.06 g, 0.138 mmol) in ethyl acetate:methanol (10:1, 33 mL), 20% palladium hydroxide (0.03 g) was added. The reaction mixture was hydrogenated under balloon pressure for 4 h. The progress of the reaction was monitored by TLC. After complete consumption of starting material, the reaction mixture was filtered through a pad of celite and the filtrate was concentrated under reduced pressure. The residue was purified by preparative TLC and repeated washing with ether to afford 6-(pyrimidin-4-ylamino)-1H-spiro[imidazo[1,5-a]pyridine-3,3′-pyrrolidine]-1,5(2H)-dione (Cpd. No. 26) as a white solid. Yield: 0.025 g, 60%; MS (ESI) m/z 299.20 [M+1]+; 1H NMR (400 MHz, DMSO-d6) δ 9.47 (s, 1H), 8.83-8.74 (m, 2H), 8.38 (d, J=5.9 Hz, 1H), 7.37 (d, J=5.9 Hz, 1H), 6.92 (d, J=7.7 Hz, 1H), 3.67 (d, J=12.6 Hz, 1H), 3.19-3.03 (m, 2H), 2.95-2.75 (m, 2H), 2.05-1.88 (m, 1H).

Provenance & Evidence