p-Toluenesulfonic acid → Isobutyl acetoacetate
반응식
[C:1](OCC)(=[O:6])[CH2:2][C:3]([CH3:5])=[O:4].C1(C)C=CC(S(O)(=O)=O)=CC=1.[CH2:21]([OH:25])[CH:22]([CH3:24])[CH3:23]>>[C:1]([O:25][CH2:21][CH:22]([CH3:24])[CH3:23])(=[O:6])[CH2:2][C:3]([CH3:5])=[O:4]참가 물질
4
실험 절차
30 ml of ethyl acetoacetate were dissolved in 350 ml of i-butyl alcohol and a catalytic amount of p-toluensulphonic acid (PTSA) was added. The solution was refluxed for 18 h. The reaction mixture was evaporated in vacuo and the residue was dissolved in ether. The resulted solution was treated with s.s. NaHCO3. The organic layer was separated, dried over Na2SO4 and evaporated in vacuo. The crude oil was distilled at 66°-68° C./4 mmHg, to give 18.8 g of the title compound.
후처리
- temperatureThe solution was refluxed for 18 h
- customThe reaction mixture was evaporated in vacuo
- dissolutionthe residue was dissolved in ether
- additionThe resulted solution was treated with s.s
- customThe organic layer was separated
- dry with materialdried over Na2SO4
- customevaporated in vacuo
- distillationThe crude oil was distilled at 66°-68° C./4 mmHg
출처 및 근거
- ORD 기록
- ord-78feaec48f454c398ecf0ddf11da5e02
- 출처 데이터셋
- uspto-grants-1998_03
- 특허 번호
- US05731322
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