Ethyl 2-vinylthiazole-5-carboxylate → Ethyl 2-ethylthiazole-5-carboxylate
反応式
[CH:1]([C:3]1[S:4][C:5]([C:8]([O:10][CH2:11][CH3:12])=[O:9])=[CH:6][N:7]=1)=[CH2:2].[H][H]>CO.[Pd]>[CH2:1]([C:3]1[S:4][C:5]([C:8]([O:10][CH2:11][CH3:12])=[O:9])=[CH:6][N:7]=1)[CH3:2]参加物
5
実験手順
To a solution of ethyl 2-vinylthiazole-5-carboxylate (400 mg, 2.18 mmol) in MeOH (7 mL) is added 10% wt. Pd/C (267 mg, 0.25 mmol) at room temperature. After stirring at room temperature under a balloon of hydrogen for 1 hour, the crude is filtered to remove Pd/C. The filtrate is concentrated to give ethyl 2-ethylthiazole-5-carboxylate (404 mg). HPLC retention time=0.60 minutes (condition B); MS (m+1)=186.3; 1H NMR (400 MHz, CD3OD) δ ppm 1.35 (t, J=7.3 Hz, 2H) 1.39 (t, J=7.20 Hz, 2H) 3.07 (q, J=7.58 Hz, 2H) 4.35 (q, J=7.16 Hz, 2H) 8.22 (s, 1H)
後処理
- filtrationthe crude is filtered
- customto remove Pd/C
- concentrationThe filtrate is concentrated
出典と根拠
- ORDレコード
- ord-48ba9859c50743bcb3cbde846ccfae78
- 出典データセット
- uspto-grants-2013_03
- 特許番号
- US08394853B2
反応ノート
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