Thymidine → HCID 131728725, compound

HRID 2425812Notes

Reaction equation

HRID 2425812 reaction equation
[C@@H:1]1([N:9]2[CH:17]=[C:15]([CH3:16])[C:13](=[O:14])[NH:12][C:10]2=[O:11])[O:8][C@H:5]([CH2:6][OH:7])[C@@H:3]([OH:4])[CH2:2]1.[CH3:18][C:19]([Si:22](Cl)([CH3:24])[CH3:23])([CH3:21])[CH3:20]>CN(C=O)C.O>[Si:22]([C@@:3]1([OH:4])[C@@H:5]([CH2:6][O:7][Si:22]([C:19]([CH3:21])([CH3:20])[CH3:18])([CH3:24])[CH3:23])[O:8][C@@H:1]([N:9]2[CH:17]=[C:15]([CH3:16])[C:13](=[O:14])[NH:12][C:10]2=[O:11])[CH2:2]1)([C:19]([CH3:21])([CH3:20])[CH3:18])([CH3:24])[CH3:23]

Participants

5

Reactant 2

HCID 5789ThymidineHCID 28928tert-Butyldimethylsilyl chloride

Product 1

HCID 131728725HCID 131728725, compound

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent2×

Procedure

To a solution of thymidine (5.00 g, 20.64 mmol) and imidiazole (9.0 g, 132.1 mmol) in anhydrous DMF (11 mL), a solution of TBSCl (9.96 g, 66.05 mmol) in DMF (11 mL) was added dropwise, and the mixture was stirred at room temperature overnight under a N2 atmosphere. After the mixture was diluted with water (100 mL), the formed precipitate was filtered and dissolved in ethyl ether (125 mL). The ether solution was washed twice with water (25 mL each) and once with brine (25 mL), dried over Na2SO4, and concentrated under reduced pressure to a waxy solid, which was re-crystallized from hexane/ethyl either (10:1) to yield 3′,5′-O-bis-tert-butyldimethylsilyl-thymidine dT.04 (10.64 g, 90%).

Workup

  1. filtrationthe formed precipitate was filtered
  2. dissolutiondissolved in ethyl ether (125 mL)
  3. washThe ether solution was washed twice with water (25 mL each) and once with brine (25 mL)
  4. dry with materialdried over Na2SO4
  5. concentrationconcentrated under reduced pressure to a waxy solid, which
  6. customwas re-crystallized from hexane/ethyl either (10:1)

Sources & evidence

ORD record
ord-fd555e28a733423d95f476b91c7aecb2
Source dataset
uspto-grants-2011_06
Patent number
US07964352B2

Reaction notes

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