Hydrochloric Acid → HCID 178462658, compound

HRID 16914Notes

Reaction equation

HRID 16914 reaction equation
C[Al](C)C.[CH3:5][O:6][C:7]1[CH:8]=[C:9]([CH2:15][CH2:16][C:17]2[CH:18]=[C:19]([NH2:22])[NH:20][N:21]=2)[CH:10]=[C:11]([O:13][CH3:14])[CH:12]=1.[CH2:23]([N:25]1[CH2:30][CH2:29][N:28]([C:31]2[CH:40]=[CH:39][C:34]([C:35](OC)=[O:36])=[CH:33][CH:32]=2)[CH2:27][CH2:26]1)[CH3:24].Cl>C1(C)C=CC=CC=1.CO>[CH3:14][O:13][C:11]1[CH:10]=[C:9]([CH2:15][CH2:16][C:17]2[CH:18]=[C:19]([NH:22][C:35](=[O:36])[C:34]3[CH:33]=[CH:32][C:31]([N:28]4[CH2:27][CH2:26][N:25]([CH2:23][CH3:24])[CH2:30][CH2:29]4)=[CH:40][CH:39]=3)[NH:20][N:21]=2)[CH:8]=[C:7]([O:6][CH3:5])[CH:12]=1

Participants

7

Reactant 4

HCID 313Hydrochloric AcidHCID 16682925TrimethylaluminumHCID 57781922Methyl 4-(4-ethylpiperazin-1-yl)benzoateHCID 178489815HCID 178489815, compound

Product 1

HCID 178462658HCID 178462658, compoundYield 51.3%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 1140TolueneSolvent

Conditions

Temperature
60 °C

Procedure

Trimethylaluminium (2M in toluene, 1.51 mL, 3.02 mmol) was added dropwise to 5-[2-(3,5-dimethoxyphenyl)ethyl]-2H-pyrazol-3-amine (299 mg, 1.21 mmol) and methyl 4-(4-ethylpiperazin-1-yl)benzoate (300 mg, 1.21 mmol) in toluene (6.0 mL) at 25° C. The resulting suspension was stirred at 60° C. for 24 h under nitrogen. The reaction mixture was added to methanol (100 mL) and was treated with HCl (2N aqueous solution, until the pH was 7 or lower). The crude product was purified by ion exchange chromatography, using a SCX column. The desired product was eluted from the column using 7M NH3/MeOH and fractions were evaporated to dryness to afford impure product. The crude product was purified by silica column chromatography, eluting with a gradient of 0 to 5% 7M NH3/MeOH in DCM. Pure fractions were evaporated to dryness to afford the title compound (288 mg, 51%) as a cream solid.

Workup

  1. customThe crude product was purified by ion exchange chromatography
  2. washThe desired product was eluted from the column
  3. customwere evaporated to dryness
  4. customto afford impure product
  5. customThe crude product was purified by silica column chromatography
  6. washeluting with a gradient of 0 to 5% 7M NH3/MeOH in DCM
  7. customPure fractions were evaporated to dryness

Sources & evidence

ORD record
ord-641c13b5349340e4803e092953d0ad2f
Source dataset
uspto-grants-2010_06
Patent number
US07737149B2

Reaction notes

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