Methyl iodide → (4R,9aR)-7-Methoxy-4,6-dimethyl-3,4,9,9a-tetrahydro-1H-2,4a,5-triaza-fluorene-2-carboxylic acid tert-butyl ester

HRID 1272123Notes

Reaction equation

HRID 1272123 reaction equation
[C:1]([O:5][C:6]([N:8]1[CH2:20][C@@H:19]([CH3:21])[N:18]2[C@H:10]([CH2:11][C:12]3[C:17]2=[N:16][C:15]([CH3:22])=[C:14]([OH:23])[CH:13]=3)[CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].[H-].[Na+].[CH3:26]I>CN(C)C=O.C(OCC)(=O)C>[C:1]([O:5][C:6]([N:8]1[CH2:20][C@@H:19]([CH3:21])[N:18]2[C@H:10]([CH2:11][C:12]3[C:17]2=[N:16][C:15]([CH3:22])=[C:14]([O:23][CH3:26])[CH:13]=3)[CH2:9]1)=[O:7])([CH3:3])([CH3:4])[CH3:2]

Participants

6

Reactant 3

HCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 69358879(4R,9aR)-7-Hydroxy-4,6-dimethyl-3,4,9,9a-tetrahydro-1H-2,4a,5-triaza-fluorene-2-carboxylic acid tert-butyl ester

Product 1

HCID 69360175(4R,9aR)-7-Methoxy-4,6-dimethyl-3,4,9,9a-tetrahydro-1H-2,4a,5-triaza-fluorene-2-carboxylic acid tert-butyl ester

Reagents, catalysts & solvents 2

HCID 6228DimethylformamideSolventHCID 8857Ethyl AcetateSolvent

Procedure

To a stirred solution of 90.0 mg (0.28 mmol) (4R,9aR)-7-hydroxy-4,6-dimethyl-3,4,9,9a-tetrahydro-1H-2,4a,5-triaza-fluorene-2-carboxylic acid tert-butyl ester (example 7, intermediate) in 1.0 mL N,N-dimethylformamide was added 14.8 mg (0.34 mmol) sodium hydride (55–65% dispersion in oil) and the reaction was stirred for 30 min. Then, 35 μl (80.0 mg, 0.56 mmol) methyl iodide was added. After 2 h the reaction mixture was diluted with ethyl acetate, washed with 10% aqueous sodium bicarbonate solution and brine, dried over magnesium sulfate and filtered. The solvent was removed at a rotary evaporator and the residue was purified by column chromatography on silica gel (0.032–0.063 mm) with ethyl acetate:n-hexane (1:1) as eluant.

Workup

  1. washwashed with 10% aqueous sodium bicarbonate solution and brine
  2. dry with materialdried over magnesium sulfate
  3. filtrationfiltered
  4. customThe solvent was removed at a rotary evaporator
  5. customthe residue was purified by column chromatography on silica gel (0.032–0.063 mm) with ethyl acetate:n-hexane (1:1) as eluant

Sources & evidence

ORD record
ord-d204416846384f37a60535fb2b5b5a25
Source dataset
uspto-grants-2007_04
Patent number
US07208494B2

Reaction notes

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