Sodium Hydroxide → 4-Isobutyl-2-(5-isobutyl-3-methylpyrazol-1-yl)-6-methylpyrimidine
Reaction equation
[C:1]([NH:4][NH2:5])([NH2:3])=[NH:2].Cl.[OH-].[Na+].[CH3:9][CH:10]([CH3:18])[CH2:11][C:12](=O)[CH2:13][C:14](=O)[CH3:15]>O>[CH2:11]([C:12]1[CH:13]=[C:14]([CH3:15])[N:3]=[C:1]([N:4]2[C:14]([CH3:15])=[CH:13][C:12]([CH2:11][CH:10]([CH3:18])[CH3:9])=[N:5]2)[N:2]=1)[CH:10]([CH3:18])[CH3:9].[CH2:11]([C:12]1[CH:13]=[C:14]([CH3:15])[N:3]=[C:1]([N:4]2[C:12]([CH2:11][CH:10]([CH3:18])[CH3:9])=[CH:13][C:14]([CH3:15])=[N:5]2)[N:2]=1)[CH:10]([CH3:18])[CH3:9]Participants
Reactant 3
Product 2
Reagents, catalysts & solvents 1
Conditions
- Temperature
- 80 °C
Procedure
To aminoguanidine hydrochloride (1.59 g, 14.4 mmol), water (5 ml), sodium hydroxide (576 mg, 14.4 mmol), and 6-methyl-2,4-heptanedione (manufactured by Tokyo Chemical Industry, purity: 97.0% or higher) (4.50 g, 31.6 mmol) were added, and then stirred at 80° C. for 8 hours. To the reaction mixture, water (30 ml) was added, and the extraction was carried out with ethyl acetate (10 ml). The extract was washed with saturated brine, dried with anhydrous sodium sulfate, and then concentrated. The obtained residue (3.83 g) was subjected to silica gel column chromatography (80 g of silica gel, chloroform to chloroform:methanol=100:1) to obtain 4-isobutyl-2-(3-isobutyl-5-methylpyrazol-1-yl)-6-methylpyrimidine (181 mg, 4%) and 4-isobutyl-2-(5-isobutyl-3-methylpyrazol-1-yl)-6-methylpyrimidine (2.05 g, 50%).
Workup
- extractionthe extraction
- washThe extract was washed with saturated brine
- dry with materialdried with anhydrous sodium sulfate
- concentrationconcentrated
Sources & evidence
- ORD record
- ord-2169f77453814d4d9f836f3b947affd6
- Source dataset
- uspto-grants-2013_11
- Patent number
- US08592582B2
Reaction notes
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