Methyl iodide → 2'-O-methyl-5-methyl-2thiouridine

HRID 641116

Reaction equation

HRID 641116 reaction equation
[CH3:1][C:2]1[C:3](=[O:18])[NH:4][C:5](=[S:17])[N:6]([CH:16]=1)[C@@H:7]1[O:15][C@H:12]([CH2:13][OH:14])[C@@H:10]([OH:11])[C@H:8]1[OH:9].[CH2:19]([Sn](=O)CCCC)CCC.CI>CN(C=O)C.[I-].C([N+](CCCC)(CCCC)CCCC)CCC.C(Cl)Cl>[CH3:19][O:9][C@@H:8]1[C@H:10]([OH:11])[C@@H:12]([CH2:13][OH:14])[O:15][C@H:7]1[N:6]1[CH:16]=[C:2]([CH3:1])[C:3](=[O:18])[NH:4][C:5]1=[S:17]

Participants

7

Reactant 3

HCID 6328Methyl iodide2×HCID 61221Dibutyltin oxideHCID 69157115-Methyl-2-thiouridine

Product 1

HCID 186605852'-O-methyl-5-methyl-2thiouridine

Reagents, catalysts & solvents 3

HCID 67553Tetrabutylammonium IodideCatalystHCID 6228DimethylformamideSolventHCID 6344DichloromethaneSolvent

Conditions

Temperature
50 °C

Procedure

To a stirred solution of 5-methyl-2-thiouridine (0.500 g, 1.8 mmol) in DMF (10 ml) is added dibutyltin oxide (0.500 g, 2.0 mmol), tetrabutyl ammonium iodide (0.738 g, 2 mmol), and methyl iodide (1.022 g, 7.2 mmol). The reaction flask is sealed and heated at 50° C. for 16 hours. The mixture is cooled and another portion of methyl iodide is added (1.022 g, 7.2 mmol) and the reaction heated for an. additional 16 hours. At the end of this time, the reaction mixture is cooled to room temperature and diluted with methylene chloride and chromatographed using a methylene chloride/methanol gradient. The appropriate fractions are collected and concentrated to give 2′-O-methyl-5-methyl-2-thiouridine.

Workup

  1. customThe reaction flask is sealed
  2. temperatureThe mixture is cooled
  3. temperaturethe reaction heated for an
  4. customadditional 16 hours
  5. temperatureAt the end of this time, the reaction mixture is cooled to room temperature
  6. customchromatographed
  7. customThe appropriate fractions are collected
  8. concentrationconcentrated

Sources & evidence

ORD record
ord-2961983b2a7b411f93eeea15cecb128a
Source dataset
uspto-grants-2010_04
Patent number
US07695902B2

Linked notes

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