Ethyl 4-isopropylthiazole-2-carboxylate → 4-Cyclobutylthiazole-2-carboxylic acid ethyl ester
反応式
Br[CH:2]1[CH2:5][CH2:4][C:3]1=[CH:6][CH:7]=O.C(OCC)(=S)C(N)=O.C(C1[N:21]=[C:22]([C:25]([O:27][CH2:28][CH3:29])=[O:26])[S:23]C=1)(C)C>>[CH2:28]([O:27][C:25]([C:22]1[S:23][CH:7]=[C:6]([CH:3]2[CH2:2][CH2:5][CH2:4]2)[N:21]=1)=[O:26])[CH3:29]参加物
4
実験手順
4-Cyclobutylthiazole-2-carboxylic acid ethyl ester 265b was synthesized from compound 264b (23.87 g, 1 eq.) and ethyl thiooxamate (21.41 g, 1 eq.) as a yellow oil in 64% yield, following the procedure as described for compound 212. 1H NMR (DMSO-d6, 400 MHz): δ (ppm) 1.32 (t, J=7.12 Hz, 3H), 1.82-1.89 (m, 1H), 1.92-2.02 (m, 1H), 2.15-2.33 (m, 4H), 3.65-3.74 (m, 1H), 4.36 (q, J=7.12 Hz, 2H), 7.76 (d, J=0.64 Hz, 1H); MS (ESI, EI+): m/z=212 (MH+).
出典と根拠
- ORDレコード
- ord-a6a8d6611115491c9b043ccc376eedc6
- 出典データセット
- uspto-grants-2015_03
- 特許番号
- US08993595B2
反応ノート
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