N-bromobutanimide → 2-Bromo-3-ethoxycyclopent-2-enone
반응식
[CH2:1]([O:3][C:4]1[CH2:8][CH2:7][C:6](=[O:9])[CH:5]=1)[CH3:2].C1C(=O)N([Br:17])C(=O)C1>C(Cl)(Cl)(Cl)Cl>[Br:17][C:5]1[C:6](=[O:9])[CH2:7][CH2:8][C:4]=1[O:3][CH2:1][CH3:2]참가 물질
4
실험 절차
3-Ethoxy-cyclopent-2-enone (Intermediate NINE1) (commercially available from Aldrich) (10.0 g, 77.6 mmol) in carbon tetrachloride (15 mL) at 0° C. was treated with NBS (15.3 g, ˜85 mmol) added portion-wise over 30 m. After 1 h at 0° C. the mixture was partitioned between CH2Cl2 and saturated NaHCO3. The aqueous layer was extracted with CH2Cl2. The pooled organic layers were washed with H2O (2×) and dried over MgSO4. The mixture was filtered and evaporated to dryness. The solid was recrystallized from pentane:ether to give 13.3 g of 2-bromo-3-ethoxy-cyclopent-2-enone (Intermediate NINE2).
후처리
- additionadded portion-wise over 30 m
- customAfter 1 h at 0° C. the mixture was partitioned between CH2Cl2 and saturated NaHCO3
- extractionThe aqueous layer was extracted with CH2Cl2
- washThe pooled organic layers were washed with H2O (2×)
- dry with materialdried over MgSO4
- filtrationThe mixture was filtered
- customevaporated to dryness
- customThe solid was recrystallized from pentane
출처 및 근거
- ORD 기록
- ord-c1af453f698c43b0be8866a0cd8155a5
- 출처 데이터셋
- uspto-grants-2011_11
- 특허 번호
- US08063086B2
반응 노트
불러오는 중…