Water → HCID 86680457, compound
Reaction equation
[CH3:1][C:2]([CH3:5])([O-:4])[CH3:3].[K+].Br[C:8]1[CH:13]=[N:12][C:11]([C:14]([CH3:16])=[CH2:15])=[CH:10][N:9]=1.[OH2:17].[O:18]1[CH2:22][CH2:21][CH2:20][CH2:19]1>>[CH2:15]=[C:14]([C:11]1[N:12]=[CH:13][C:8]([O:18][C@H:22]2[CH2:10][N:9]3[CH2:8][CH2:13][N:12]([C:11]([O:4][C:2]([CH3:5])([CH3:3])[CH3:1])=[O:17])[CH2:19][C@@H:20]3[CH2:21]2)=[N:9][CH:10]=1)[CH3:16]Participants
Procedure
To a solution of the product from Example 202A (0.88 g, 3.63 mmol)) in anhydrous tetrahydrofuran (20 mL) was added a 1.0 M solution of potassium tert-butoxide in tetrahydrofuran (4.36 mL, 4.36 mmol). The resulting mixture was stirred at room temperature for 20 minutes, and then 2-bromo-5-(prop-1-en-2-yl)pyrazine (0.867 g, 4.36 mmol) was added. The resulting dark mixture was stirred at room temperature for 16 hours, and the mixture was then poured into water (50 mL) and extracted with ethyl acetate (3×50 mL). The combined organic layers were dried over Na2SO4. The drying agent was removed by filtration, and the crude product was purified by column chromatography on silica gel using a solvent gradient of 0-60% ethyl acetate in hexanes. The title compound was obtained as a light tan oil that crystallized on standing (0.67 g, 51.2%).
Workup
- stirringThe resulting dark mixture was stirred at room temperature for 16 hours
- extractionextracted with ethyl acetate (3×50 mL)
- dry with materialThe combined organic layers were dried over Na2SO4
- customThe drying agent was removed by filtration
- customthe crude product was purified by column chromatography on silica gel using a solvent gradient of 0-60% ethyl acetate in hexanes
Sources & evidence
- ORD record
- ord-95a7c414454449b19275fe5bc6a025a4
- Source dataset
- uspto-grants-2014_02
- Patent number
- US08648074B2
Reaction notes
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