反应详情

A solution of (2R,3R,4R,5R)-4-(acetyloxy)-2-[6-[(2,2-diphenylethyl)amino]-2-({[2-(1-piperidinyl)ethyl]amino}carbonyl)-9H-purin-9-yl]-5-(2-ethyl-2H-tetrazol-5-yl)tetrahydro-3-furanyl acetate (Preparation 27) (230 mg, 0.31 mmol) and sodium carbonate (130 mg, 1.23 mmol) in methanol (15 ml) and water (1.5 ml) was stirred at room temperature overnight. The solvent was evaporated under reduced pressure and the residue was partioned between ethyl acetate (50 ml) and water (10 ml). The organic layer was washed with brine (10 ml), dried (anhydrous sodium sulphate) and evaporated under reduced pressure. The residue was purified by column chromatography on silica gel eluting with a gradient system of dichloromethane:methanol:0.88 concentrated aqueous ammonia (95:5:0.5 by volume) gradually changing to dichloromethane:methanol:0.88 concentrated aqueous ammonia (93:7:0.7 by volume). Product containing fractions were evaporated and the resulting solid triturated with ether, filtered and dried to afford the title compound as a white powder (158 mg).

1. customThe solvent was evaporated under reduced pressure
2. washThe organic layer was washed with brine (10 ml)
3. dry with materialdried (anhydrous sodium sulphate)
4. customevaporated under reduced pressure
5. customThe residue was purified by column chromatography on silica gel eluting with a gradient system of dichloromethane
6. additionProduct containing fractions
7. customwere evaporated
8. customthe resulting solid triturated with ether
9. filtrationfiltered
10. customdried