Dicyclohexylcarbodiimide → HCID 136335119, compound

Participants

Reaction Steps

A mixture of 2′,3′-dideoxy-3′-fluoro-5′-O-[3-(1,3-dihydroxy-2-propyloxy carbonyl)-propanoyl] guanosine (1.3 g, 2.93 mmole), N-CBZ-L-valine (1.00 g, 4 mmole), HOBT (0.54 g, 4 mmole) and DMAP (48.8 mg, 0.4 mmole) was coevaporated two times with DMF and reduced to about 60 ml. DCC (0.91 g, 4.4 mmole) was added and the mixture was stirred for 72 hours at room temperature. The mixture was filtered and the solution evaporated under reduced pressure. Ethyl acetate (150 ml) was added and the organic phase washed twice with 5% acetic acid, 5% sodium hydrogen carbonate and water. The organic phase was dried with sodium sulfate and evaporated under reduced pressure. The product was isolated by silica gel column chromatography. Yield: 0.99 g

Provenance & Evidence