Sodium Hydroxide → 2-Ethyloxazole-5-carboxylic acid
反応式
[CH2:1]([C:3]1[O:4][C:5]([C:8]([O-:10])=[O:9])=[CH:6][N:7]=1)[CH3:2].[OH-].[Na+]>CO>[CH2:1]([C:3]1[O:4][C:5]([C:8]([OH:10])=[O:9])=[CH:6][N:7]=1)[CH3:2]参加物
4
実験手順
Next, to a solution of 2-ethyloxazole-5-carboxylate (470 mg, 2.81 mmol) in MeOH (10 mL) is added 1N NaOH (6 mL, 6 mmol). After stirring at room temperature for 18 hours, the crude is concentrated under reduced pressure to remove MeOH and is diluted with EtOAc. The organic layer is washed with brine, dried over Na2SO4, filtered and concentrated under reduced pressure to give 2-ethyloxazole-5-carboxylic acid (244 mg). 1H NMR (400 MHz, CD3OD) δ ppm 1.36 (t, J=7.7 Hz, 3 H) 2.89 (q, J=7.6 Hz, 2 H) 5.15 (br. s., 1 H) 7.69 (s, 1 H)
後処理
- concentrationthe crude is concentrated under reduced pressure
- customto remove MeOH
- additionis diluted with EtOAc
- washThe organic layer is washed with brine
- dry with materialdried over Na2SO4
- filtrationfiltered
- concentrationconcentrated under reduced pressure
出典と根拠
- ORDレコード
- ord-bb167663cda7474b8f83dd66706f1c09
- 出典データセット
- uspto-grants-2015_04
- 特許番号
- US09006249B2
反応ノート
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