Sodium Hydroxide → 3-Chloro-2,2-dimethylbut-3-enoic acid
反応式
[Cl:1][C:2](=[CH2:10])[C:3]([CH3:9])([CH3:8])[C:4]([O:6]C)=[O:5].[OH-].[Na+]>O>[Cl:1][C:2](=[CH2:10])[C:3]([CH3:9])([CH3:8])[C:4]([OH:6])=[O:5]参加物
4
実験手順
A mixture of methyl 3-chloro-2,2-dimethylbut-3-enoate (33 g, 0.2 mol) and NaOH (9.6 g, 0.24 mol) in water (200 mL) was heated at reflux for 5 h. The mixture was cooled to ambient temperature and extracted with ether. The organic layer was discarded. The aqueous layer was acidified with cold 20% HCl solution and extracted ether (200 mL×3). The combined organic layers were dried and evaporated under reduced pressure to give 3-chloro-2,2-dimethyl-but-3-enoic acid (21 g, 70%), which was used directly in the next step. 1H NMR (400 MHz, CDCl3) δ 7.90 (brs, 1H), 5.37 (dd, J=2.4, 6.8 Hz, 2H), 1.47 (s, 6H).
後処理
- temperaturewas heated
- temperatureat reflux for 5 h
- extractionextracted with ether
- extractionextracted ether (200 mL×3)
- customThe combined organic layers were dried
- customevaporated under reduced pressure
出典と根拠
- ORDレコード
- ord-d937fe982c404dc3af3e207927afa11a
- 出典データセット
- uspto-grants-2014_01
- 特許番号
- US08623905B2
反応ノート
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