3-Acetylpyridine → ethyl (2Z)-3-(pyridin-3-yl)but-2-enoate

HRID 224875

반응식

HRID 224875 반응식
[Br-].[CH2:2]([O:4]C(C[P+](C1C=CC=CC=1)(C1C=CC=CC=1)C1C=CC=CC=1)=O)[CH3:3].[O-:27][CH2:28][CH3:29].[Na+].[C:31]([C:34]1[CH:35]=[N:36][CH:37]=[CH:38][CH:39]=1)(=O)[CH3:32]>C(O)C>[N:36]1[CH:37]=[CH:38][CH:39]=[C:34](/[C:31](/[CH3:32])=[CH:29]\[C:28]([O:4][CH2:2][CH3:3])=[O:27])[CH:35]=1

참가 물질

5

반응물 3

HCID 95893-AcetylpyridineHCID 73731(Ethoxycarbonylmethyl)triphenylphosphonium bromideHCID 2723922Sodium ethoxide

생성물 1

HCID 67402107ethyl (2Z)-3-(pyridin-3-yl)but-2-enoate수율 111.3%

시약·촉매·용매 1

HCID 702Ethanol용매3회

실험 절차

Ethoxycarbonylmethyltriphenylphosphonium bromide (100 g) in ethanol (500 ml) was added with stirring under nitrogen to a solution of sodium ethoxide (from 4.28 g sodium) in ethanol (100 ml). 3-Acetylpyridine (18.8 g) in ethanol (300 ml) was added dropwise over 0.5 hour. The mixture was allowed to stand for 14 days and was evaporated to dryness. The residue was taken up in water, the pH adjusted to 8.5 and the mixture was extracted with benzene. The extract was dried, evaporated and the residue was distilled at reduced pressure to give ethyl 3-(3-pyridyl)-crotonate (13.39 g) b.p. 78°/0.1 mmHg.

후처리

  1. customwas evaporated to dryness
  2. extractionthe mixture was extracted with benzene
  3. customThe extract was dried
  4. customevaporated
  5. distillationthe residue was distilled at reduced pressure

출처 및 근거

ORD 기록
ord-e810e93309c649d99782bfc28a9990d6
출처 데이터셋
uspto-grants-1980_11
특허 번호
US04234588

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