Ethanol → 5-(1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazol-4-yl)imidazo[1,2-c]pyrimidine-7-carbohydrazide

HRID 1852998Notes

Reaction equation

HRID 1852998 reaction equation
[CH3:1][Si:2]([CH3:26])([CH3:25])[CH2:3][CH2:4][O:5][CH2:6][N:7]1[CH:11]=[C:10]([C:12]2[N:17]3[CH:18]=[CH:19][N:20]=[C:16]3[CH:15]=[C:14]([C:21]([O:23]C)=O)[N:13]=2)[CH:9]=[N:8]1.CCO.O.[NH2:31][NH2:32]>>[CH3:26][Si:2]([CH3:1])([CH3:25])[CH2:3][CH2:4][O:5][CH2:6][N:7]1[CH:11]=[C:10]([C:12]2[N:17]3[CH:18]=[CH:19][N:20]=[C:16]3[CH:15]=[C:14]([C:21]([NH:31][NH2:32])=[O:23])[N:13]=2)[CH:9]=[N:8]1

Participants

4

Reactant 3

HCID 702EthanolHCID 24654Hydrazine hydrate (1:1)HCID 67456583methyl 5-(1-((2-(trimethylsilyl)-ethoxy)methyl)-1H-pyrazol-4-yl)imidazo[1,2-c]pyrimidine-7-carboxylate

Product 1

HCID 674592615-(1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazol-4-yl)imidazo[1,2-c]pyrimidine-7-carbohydrazideYield 92.7%

Procedure

In a 20 mL flask, methyl 5-(1-((2-(trimethylsilyl)-ethoxy)methyl)-1H-pyrazol-4-yl)imidazo[1,2-c]pyrimidine-7-carboxylate (Example 122; Step C) (50 mg, 0.13 mmol) was dissolved in EtOH (540 μL, 0.13 mmol). To this was added a large excess of hydrazine hydrate (104 μL, 3.3 mmol). The reaction mixture was refluxed for 1 hour, and then concentrated down to dryness. The residue was diluted in EtOAc and washed with water and brine. The organic layer was dried with MgSO4, filtered and concentrated in vacuo to afford 5-(1-((2-(trimethylsilyl)ethoxy)methyl)-1H-pyrazol-4-yl)imidazo[1,2-c]pyrimidine-7-carbohydrazide (45 mg, 90% yield) as a yellow oil. MS (apci) m/z=374.4 (M+H).

Workup

  1. temperatureThe reaction mixture was refluxed for 1 hour
  2. concentrationconcentrated down to dryness
  3. additionThe residue was diluted in EtOAc
  4. washwashed with water and brine
  5. dry with materialThe organic layer was dried with MgSO4
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-2bdad90558ac43a8a7659786e487c093
Source dataset
uspto-grants-2015_02
Patent number
US08962596B2

Reaction notes

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