Dicyclohexylcarbodiimide → 2',3'-Dideoxy-3'-fluoro-5'-o-[3,3-bis(n-cbz-l-valyloxymethyl)-propionyl]guanosine

HRID 489072Notes

Reaction equation

HRID 489072 reaction equation
[F:1][C@@H:2]1[C@@H:6]([CH2:7][OH:8])[O:5][C@@H:4]([N:9]2[C:19]3[N:18]=[C:16]([NH2:17])[NH:15][C:13](=[O:14])[C:12]=3[N:11]=[CH:10]2)[CH2:3]1.[C:20]([NH:30][C@H:31]([C:35]([O:37][CH2:38][CH:39]([CH2:44][O:45][C:46](=[O:62])[C@H:47]([CH:59]([CH3:61])[CH3:60])[NH:48][C:49]([O:51][CH2:52][C:53]1[CH:58]=[CH:57][CH:56]=[CH:55][CH:54]=1)=[O:50])[CH2:40][C:41](O)=[O:42])=[O:36])[CH:32]([CH3:34])[CH3:33])([O:22][CH2:23][C:24]1[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=1)=[O:21].C1C=CC2N(O)N=NC=2C=1.C1CCC(N=C=NC2CCCCC2)CC1>CN(C1C=CN=CC=1)C.CN(C=O)C>[F:1][C@@H:2]1[C@@H:6]([CH2:7][O:8][C:41](=[O:42])[CH2:40][CH:39]([CH2:44][O:45][C:46](=[O:62])[C@H:47]([CH:59]([CH3:61])[CH3:60])[NH:48][C:49]([O:51][CH2:52][C:53]2[CH:54]=[CH:55][CH:56]=[CH:57][CH:58]=2)=[O:50])[CH2:38][O:37][C:35](=[O:36])[C@H:31]([CH:32]([CH3:34])[CH3:33])[NH:30][C:20]([O:22][CH2:23][C:24]2[CH:29]=[CH:28][CH:27]=[CH:26][CH:25]=2)=[O:21])[O:5][C@@H:4]([N:9]2[C:19]3[N:18]=[C:16]([NH2:17])[NH:15][C:13](=[O:14])[C:12]=3[N:11]=[CH:10]2)[CH2:3]1

Participants

7

Reactant 4

HCID 10868DicyclohexylcarbodiimideHCID 757711-HydroxybenzotriazoleHCID 233875233,3-bis(N-CBz-L-valyloxymethyl)-propionic acidHCID 1354318173'-Fluoro-2',3'-dideoxyguanosine

Product 1

HCID 1360298392',3'-Dideoxy-3'-fluoro-5'-o-[3,3-bis(n-cbz-l-valyloxymethyl)-propionyl]guanosine

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6228DimethylformamideSolvent

Procedure

A solution of 2′,3′-dideoxy-3′-fluoroguanosine (1.35 g, 5 mmole), 3,3-bis(N-CBZ-L-valyloxymethyl)-propionic acid (3.6 g, 6 mmole), DMAP (0.061 g, 0.5 mmole) and HOBT (0.81 g, 6 mmole) was coevaporated two times with DMF and reduced to about 120 ml. DCC (1.24 g, 6 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 (200 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: 2.7 g

Workup

  1. filtrationThe mixture was filtered
  2. customthe solution was evaporated under reduced pressure
  3. additionEthyl acetate (200 ml) was added
  4. washthe organic phase washed twice with 5% acetic acid, 5% sodium hydrogen carbonate and water
  5. dry with materialThe organic phase was dried with sodium sulfate
  6. customevaporated under reduced pressure
  7. customThe product was isolated by silica gel column chromatography

Sources & evidence

ORD record
ord-1551dfdd52fd4f92b9fa75f1fcfe193b
Source dataset
uspto-grants-2005_12
Patent number
US06974802B2

Reaction notes

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