反应详情

A mixture of racemic trans [3-(6H-1,2,3,5,6-pentaaza-as-indacen-1-yl)-cyclopentyl]-carbamic acid tert-butyl ester (900 mg, 2.63 mmol), trifluoroacetic acid (5 mL), water (50.0 μL) and DCM (10 mL) was stirred at ambient temperature for 5 hours. The solvents were removed in vacuo and the resulting residue purified by column chromatography (SCX-2, gradient: methanol to 2M NH3 in methanol) to give 586 mg (92%) of racemic trans 3-(6H-1,2,3,5,6-pentaaza-as-indacen-1-yl)-cyclopentylamine as a white foam solid. LCMS (Method B, ESI): RT=0.36 & 1.05 min, m+H=243.3; 1H NMR (400 MHz, DMSO) δ: 12.35 (br s, 1H), 8.98 (s, 1H), 7.59 (d, 1H), 6.98 (d, 1H), 5.67 (m, 1H), 3.67 (m, 1H), 2.52 (m, 1H, partially obscured by DMSO), 2.40 (m, 1H), 2.25-2.03 (m, 3H), 1.54 (m, 1H).

1. customThe solvents were removed in vacuo
2. customthe resulting residue purified by column chromatography (SCX-2, gradient: methanol to 2M NH3 in methanol)