Sodium bis(trimethylsilyl)amide → 3-methyl-2-oxazol-2-yl-1-phenyl-1H-[1,8]naphthyridin-4-one

HRID 1887785Notes

Reaction equation

[C:1]1([NH:7][C:8]2[C:13]([C:14](=[O:17])[CH2:15][CH3:16])=[CH:12][CH:11]=[CH:10][N:9]=2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.C[Si]([N-][Si](C)(C)C)(C)C.[Na+].[O:28]1[CH:32]=[CH:31][N:30]=[C:29]1[C:33](Cl)=O>C1COCC1.CN(C=O)C.O>[CH3:16][C:15]1[C:14](=[O:17])[C:13]2[C:8](=[N:9][CH:10]=[CH:11][CH:12]=2)[N:7]([C:1]2[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=2)[C:33]=1[C:29]1[O:28][CH:32]=[CH:31][N:30]=1

Participants

Conditions

Temperature: 25 °C

Procedure

A solution of 1-(2-phenylamino-pyridin-3-yl)-propan-1-one (2.0 g, 8.84 mmol) in THF (17.7 mL) at 25° C. was treated with sodium bis(trimethylsilyl)amide (1.0 M in THF) (22.1 mL, 22.1 mmol). The resulting red solution was then treated with a mixture of oxazole-2-carbonyl chloride (1.51 g, 11.5 mmol) in THF (8 mL) and 10 drops of DMF. The reaction was then stirred at 25° C. overnight. The reaction was diluted with water (50 mL) and was then extracted into ethyl acetate (3×50 mL). The organics were dried over sodium sulfate, filtered and concentrated in vacuo. The resulting residue was absorbed onto silica and dried under high vacuum. Flash chromatography (25 g, 25%-75% ethyl acetate-hexanes) afforded 3-methyl-2-oxazol-2-yl-1-phenyl-1H-[1,8]naphthyridin-4-one (540 mg, 20.1%) as a light yellow solid.

Workup

extractionwas then extracted into ethyl acetate (3×50 mL)
dry with materialThe organics were dried over sodium sulfate
filtrationfiltered
concentrationconcentrated in vacuo
customThe resulting residue was absorbed onto silica
customdried under high vacuum

Sources & evidence

ORD record: ord-56fa0c510c3b41fe92b5d5904b4ff22e
Source dataset: uspto-grants-2013_08
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08501732B2

Reaction notes

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