Methyl iodide → HCID 57947560, compound

HRID 416404Notes

Reaction equation

HRID 416404 reaction equation
[C:1]([O:4][CH2:5][CH2:6][CH2:7][C@H:8]([NH:18][C:19]([O:21][C:22]([CH3:25])([CH3:24])[CH3:23])=[O:20])[CH2:9][O:10][Si:11]([C:14]([CH3:17])([CH3:16])[CH3:15])([CH3:13])[CH3:12])(=[O:3])[CH3:2].[CH3:26]I.[H-].[Na+]>CN(C=O)C>[C:1]([O:4][CH2:5][CH2:6][CH2:7][C@H:8]([N:18]([C:19]([O:21][C:22]([CH3:25])([CH3:24])[CH3:23])=[O:20])[CH3:26])[CH2:9][O:10][Si:11]([C:14]([CH3:15])([CH3:16])[CH3:17])([CH3:12])[CH3:13])(=[O:3])[CH3:2]

Participants

5

Reactant 3

HCID 6328Methyl iodideHCID 24758Sodium hydrideHCID 57947471HCID 57947471, compound

Product 1

HCID 57947560HCID 57947560, compoundYield 105.6%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
0 °C

Procedure

To a solution of (S)-4-(tert-butoxycarbonylamino)-5-(tert-butyldimethylsilyloxy)pentyl acetate (48.2 g, 0.124 mol) and MeI (23.2 mL, 0.372 mol) in DMF (500 mL) was added sodium hydride (60%, 9.9 g, 0.248 mol) at 0° C. The resulting mixture was stirred at 0° C. for 2½ h and LC-MS indicated the reaction was completed. The reaction was quenched with saturated NH4Cl solution and diluted with EtOAc. The organic layer was washed with water and brine, dried over Na2SO4, filtered, and concentrated to give (S)-4-(tert-butoxycarbonyl(methyl)amino)-5-(tert-butyldimethylsilyloxy)pentyl acetate (51 g, crude). LRMS (M+H+-Boc) m/z 290.2.

Workup

  1. customThe reaction was quenched with saturated NH4Cl solution
  2. additiondiluted with EtOAc
  3. washThe organic layer was washed with water and brine
  4. dry with materialdried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated

Sources & evidence

ORD record
ord-ff5a85df496443cdae0f8dda883980d9
Source dataset
uspto-grants-2012_01
Patent number
US08088793B2

Reaction notes

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