反应详情

A mixture of 2′,3′-dideoxy-3′-fluoroguanosine (404 mg, 1.5 mmole), 2-(N-FMOC-L-valyloxy)stearic acid (1.24 g, 2 mmole), DMAP (24 mg, 0.2 mmole) and HOBT (264 mg, 1,95 mmole) was coevaporated two times with DMF and reduced to about 30 ml. DCC (372 mg, 1.8 mmole) was added and the mixture was stirred overnight at room temperature. The mixture was filtered and the solution was evaporated under reduced pressure. Ethyl acetate (50 ml) was added and the organic phase washed twice with 5% acetic acid, with 5% sodium hydrogen carbonate and with water. The organic phase was dried with sodium sulfate and evaporated under reduced pressure.

1. filtrationThe mixture was filtered
2. customthe solution was evaporated under reduced pressure
3. additionEthyl acetate (50 ml) was added
4. washthe organic phase washed twice with 5% acetic acid, with 5% sodium hydrogen carbonate and with water
5. dry with materialThe organic phase was dried with sodium sulfate
6. customevaporated under reduced pressure