Trifluoroacetic acid → (2S)-(2R,3S,4R,5R)-2-((((((2R,3S,5R)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-2-((phosphonooxy)methyl)tetrahydrofuran-3-yl)oxy)(hydroxy)phosphoryl)oxy)methyl)-5-(6-amino-9H-purin-9-yl)-4-hydroxytetrahydrofuran-3-yl 2-amino-4-((S)-thiazolidin-5-yl)butanoate

Participants

Reaction Steps

A 10% solution of trifluoroacetic acid in dichloromethane (0.16 mL) was added to a solution of (5S)-tert-butyl 5-((3S)-4-(((2R,3S,4R,5R)-2-((((((2R,3S,5R)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-2-((phosphonooxy)methyl)tetrahydrofuran-3-yl)oxy) (hydroxy)phosphoryl)oxy)methyl)-5-(6-amino-9H-purin-9-yl)-4-hydroxytetrahydrofuran-3-yl)Oxy)-3-((tert-butoxycarbonyl)amino)-4-oxobutyl)thiazolidine-3-carboxylate (Compound tk4) (8.5 mg, 8.43 μmol) in dichloromethane (0.2 mL), and the mixture was stirred at room temperature for 1.25 hours. Following concentration under reduced pressure, (2S)-(2R,3S,4R,5R)-2-((((((2R,3S,5R)-5-(4-amino-2-oxopyrimidin-1(2H)-yl)-2-((phosphonooxy)methyl)tetrahydrofuran-3-yl)oxy)(hydroxy)phosphoryl)oxy)methyl)-5-(6-amino-9H-purin-9-yl)-4-hydroxytetrahydrofuran-3-yl 2-amino-4-((S)-thiazolidin-5-yl)butanoate (Ala(Tzm)-pdCpA) (Compound tk5) (10.6 mg, quant.) was obtained.

Provenance & Evidence