Sodium hydride → 2-[6-Chloro-1-(2-dimethylamino-ethyl)-1H-indazol-3-yl]-5-(2-trimethylsilanylethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((S)-2-methoxy-1-methyl-ethyl)amide

HRID 246250Notes

Reaction equation

HRID 246250 reaction equation
[CH3:1][O:2][CH2:3][C@@H:4]([NH:6][C:7]([C:9]1[C:17]2[C:12](=[N:13][CH:14]=[C:15]([C:18]3[C:26]4[C:21](=[CH:22][C:23]([Cl:27])=[CH:24][CH:25]=4)[NH:20][N:19]=3)[N:16]=2)[N:11]([CH2:28][O:29][CH2:30][CH2:31][Si:32]([CH3:35])([CH3:34])[CH3:33])[CH:10]=1)=[O:8])[CH3:5].[H-].[Na+].Br.[CH3:39][N:40]([CH2:42][CH2:43]Br)[CH3:41]>CN(C=O)C>[CH3:1][O:2][CH2:3][C@@H:4]([NH:6][C:7]([C:9]1[C:17]2[C:12](=[N:13][CH:14]=[C:15]([C:18]3[C:26]4[C:21](=[CH:22][C:23]([Cl:27])=[CH:24][CH:25]=4)[N:20]([CH2:43][CH2:42][N:40]([CH3:41])[CH3:39])[N:19]=3)[N:16]=2)[N:11]([CH2:28][O:29][CH2:30][CH2:31][Si:32]([CH3:33])([CH3:35])[CH3:34])[CH:10]=1)=[O:8])[CH3:5]

Participants

5

Reactant 3

HCID 24758Sodium hydrideHCID 457913472-Bromoethyldimethylammonium bromideHCID 712883772-(6-chloro-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((S)-2-methoxy-1-methyl-ethyl)-amide

Product 1

HCID 712883792-[6-Chloro-1-(2-dimethylamino-ethyl)-1H-indazol-3-yl]-5-(2-trimethylsilanylethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((S)-2-methoxy-1-methyl-ethyl)amideYield 55%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
0 °C

Procedure

2-(6-Chloro-1H-indazol-3-yl)-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((S)-2-methoxy-1-methyl-ethyl)-amide (80 mg, 0.16 mmol) was combined with DMF (8 mL) at 0° C. to give a yellow solution. Sodium hydride (60% in mineral oil, 19 mg, 0.47 mmol) was added and the reaction was stirred at 0° C. for 10 min. Dimethylaminoethyl bromide hydrobromide (54 mg, 0.23 mmol) was added and the reaction was stirred at 0° C. for 30 min, then allowed to warm to room temperature and stirred for 2 h. The reaction mixture was quenched with 5 mL of brine and 10 mL of water, then extracted with ethyl acetate (2×30 mL). The combined organic layers were washed with water and brine, then dried and concentrated in vacuo. The crude material was purified by silica gel chromatography (0-10% methanol in dichloromethane) to afford 50 mg (55%) of 2-[6-chloro-1-(2-dimethylamino-ethyl)-1H-indazol-3-yl]-5-(2-trimethylsilanyl-ethoxymethyl)-5H-pyrrolo[2,3-b]pyrazine-7-carboxylic acid ((S)-2-methoxy-1-methyl-ethyl)-amide as a foaming solid. MS: (M+H)+=587.

Workup

  1. customto give a yellow solution
  2. stirringthe reaction was stirred at 0° C. for 30 min
  3. temperatureto warm to room temperature
  4. stirringstirred for 2 h
  5. customThe reaction mixture was quenched with 5 mL of brine and 10 mL of water
  6. extractionextracted with ethyl acetate (2×30 mL)
  7. washThe combined organic layers were washed with water and brine
  8. customdried
  9. concentrationconcentrated in vacuo
  10. customThe crude material was purified by silica gel chromatography (0-10% methanol in dichloromethane)

Sources & evidence

ORD record
ord-186476861138432f9c6b5794e599829b
Source dataset
uspto-grants-2014_02
Patent number
US08658646B2

Reaction notes

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