Benzyl Bromide → 3-[N-(Benzyloxycarbonyl)-N-methylaminomethyl)-1-benzyl-1H-indole

HRID 225898Notes

Reaction equation

HRID 225898 reaction equation
[H-].[Na+].[CH2:3]([O:10][C:11]([N:13]([CH2:15][C:16]1[C:24]2[C:19](=[CH:20][CH:21]=[CH:22][CH:23]=2)[NH:18][CH:17]=1)[CH3:14])=[O:12])[C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1.[CH2:25](Br)[C:26]1[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=1>CN(C=O)C.O>[CH2:3]([O:10][C:11]([N:13]([CH2:15][C:16]1[C:24]2[C:19](=[CH:20][CH:21]=[CH:22][CH:23]=2)[N:18]([CH2:25][C:26]2[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=2)[CH:17]=1)[CH3:14])=[O:12])[C:4]1[CH:9]=[CH:8][CH:7]=[CH:6][CH:5]=1

Participants

6

Reactant 3

HCID 7498Benzyl BromideHCID 24758Sodium hydride2×HCID 221390863-[N-(benzyloxycarbonyl)-N-methylaminomethyl]-1H-indole

Product 1

HCID 221390153-[N-(Benzyloxycarbonyl)-N-methylaminomethyl)-1-benzyl-1H-indoleYield 93.6%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6228DimethylformamideSolvent

Conditions

Temperature
0 °C

Procedure

NaH (60% dispersion in mineral oil, 0.15 g, 3.8 mmole) was added portionwise, allowing for gas evolution, to a solution of 3-[N-(benzyloxycarbonyl)-N-methylaminomethyl]-1H-indole (0.7 g, 2.5 mmole) in DMF (25 mL) at 0° C. When the NaH addition was complete, benzyl bromide (1.2 mL, 10.0 mmole) was added at 0° C. The reaction was stirred at 0° C. for 15 minutes then at RT overnight. The reaction was diluted with water and extracted with ethyl acetate. The combined extracts were dried over Na2SO4 and concentrated. Flash chromatography on silica gel (33% ethyl acetate/hexanes) gave the title compound (0.9 g, 93%) as an off white solid: MS (ES) m/e 385 (M+H)+.

Workup

  1. customat RT
  2. customovernight
  3. extractionextracted with ethyl acetate
  4. dry with materialThe combined extracts were dried over Na2SO4
  5. concentrationconcentrated

Sources & evidence

ORD record
ord-c69d5c7a2636440b8c227d1c7d0bbd41
Source dataset
uspto-grants-2009_07
Patent number
US07557125B2

Reaction notes

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