Dicyclohexylcarbodiimide → 2',3'-dideoxy-3'-fluoro-5'-O-{3-[2,3-bis(N-CBZ-L-valyloxy)-1-propyloxycarbonyl]propanoyl}guanosine

HRID 489082Notes

Reaction equation

HRID 489082 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.C1C=CC2N(O)N=NC=2C=1.[C:30]([NH:40][C@H:41]([C:45]([O:47][CH:48]([CH2:58][O:59][C:60](=[O:76])[C@H:61]([CH:73]([CH3:75])[CH3:74])[NH:62][C:63]([O:65][CH2:66][C:67]1[CH:72]=[CH:71][CH:70]=[CH:69][CH:68]=1)=[O:64])[CH2:49][O:50][C:51](=[O:57])[CH2:52][CH2:53][C:54](O)=[O:55])=[O:46])[CH:42]([CH3:44])[CH3:43])([O:32][CH2:33][C:34]1[CH:39]=[CH:38][CH:37]=[CH:36][CH:35]=1)=[O:31].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:54](=[O:55])[CH2:53][CH2:52][C:51]([O:50][CH2:49][CH:48]([O:47][C:45](=[O:46])[C@H:41]([CH:42]([CH3:44])[CH3:43])[NH:40][C:30]([O:32][CH2:33][C:34]2[CH:35]=[CH:36][CH:37]=[CH:38][CH:39]=2)=[O:31])[CH2:58][O:59][C:60](=[O:76])[C@H:61]([CH:73]([CH3:75])[CH3:74])[NH:62][C:63]([O:65][CH2:66][C:67]2[CH:68]=[CH:69][CH:70]=[CH:71][CH:72]=2)=[O:64])=[O:57])[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 68763170succinic acid 2,3-bis-(N-CBZ-L-valyloxy)-1-propyl esterHCID 1354318173'-Fluoro-2',3'-dideoxyguanosine

Product 1

HCID 1364003712',3'-dideoxy-3'-fluoro-5'-O-{3-[2,3-bis(N-CBZ-L-valyloxy)-1-propyloxycarbonyl]propanoyl}guanosine

Reagents, catalysts & solvents 2

HCID 142844-(Dimethylamino)pyridineCatalystHCID 6228DimethylformamideSolvent

Procedure

A mixture of 2′,3′-dideoxy-3′-fluoroguanosine (0.538 g, 2 mmole), HOBT (0.327 g, 2.42 mmole), DMAP(29.3 mg, 0.24 mmole) and succinic acid 2,3-bis-(N-CBZ-L-valyloxy)-1-propyl ester (1.6 g, 2.42 mmole) was coevaporated two times with DMF and reduced to about 50 ml. DCC (0.536 g, 2.6 mmole) was added and the mixture was stirred 72 hours at room temperature. The mixture was filtered and the solution was evaporated under reduced pressure. 100 ml of ethyl acetate 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: 0.65 g.

Workup

  1. filtrationThe mixture was filtered
  2. customthe solution was evaporated under reduced pressure
  3. addition100 ml of ethyl acetate 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-55c8573f2cb44dd4b04c4cadacd28e7a
Source dataset
uspto-grants-2005_12
Patent number
US06974802B2

Reaction notes

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