反应详情

A mixture of 6-(4-aminopiperidin-1-yl)-7,9-dihydropurin-8-one (Example 4B, 0.045 g, 0.20 mmol), phenylacetaldehyde (0.025 ml, 0.20 mmol), NaBH(OAc)3 (0.065 g, 0.30 mmol) and acetic acid (5 drops) in 1,2-dichloroethane (2 ml) and MeOH (0.5 ml) was stirred at room temperature for 2 hours. The solution was absorbed onto a 5 g SCX-II acidic resin cartridge and eluted with MeOH, then 1M NH3-MeOH. The basic eluant was concentrated. Preparative thin layer chromatography (t.l.c.), eluting with 1% NH3 (aq)/9% MeOH/90% CH2Cl2 gave the product as an off white solid (0.007 g, 10%). LC/MS: (LCT) Rt 3.62 [M+H]+339.

1. customThe solution was absorbed onto a 5 g SCX-II acidic resin cartridge
2. washeluted with MeOH
3. concentrationThe basic eluant was concentrated
4. washPreparative thin layer chromatography (t.l.c.), eluting with 1% NH3 (aq)/9% MeOH/90% CH2Cl2