Sodium Iodide → Ethyl 1,4-benzodioxin-2-carboxylate

HRID 37154노트

반응식

HRID 37154 반응식
Br[C:2]1([C:13]([O:15][CH2:16][CH3:17])=[O:14])[O:7][C:6]2[CH:8]=[CH:9][CH:10]=[CH:11][C:5]=2[O:4][CH:3]1Br.[I-].[Na+]>CC(C)=O>[O:7]1[C:6]2[CH:8]=[CH:9][CH:10]=[CH:11][C:5]=2[O:4][CH:3]=[C:2]1[C:13]([O:15][CH2:16][CH3:17])=[O:14]

참가 물질

4

반응물 2

HCID 5238Sodium IodideHCID 11079061Ethyl 2,3-dibromo-1,4-benzodioxin-2-carboxylate

생성물 1

HCID 10987416Ethyl 1,4-benzodioxin-2-carboxylate수율 85%

시약·촉매·용매 1

HCID 180Acetone용매

실험 절차

Stir for 3 hours, at room temperature and under a nitrogen atmosphere, a mixture of 16 g (43.7 mmol) of ethyl 2,3-dibromo-1,4-benzodioxin-2-carboxylate and 24 g (160 mmol) of sodium iodide in 80 cm3 of anhydrous acetone. The reaction mixture is then concentrated under reduced pressure, hydrolysed with 80 cm3 of water, and subsequently extracted with diethyl ether. After treatment with an aqueous sodium thiosulfate solution followed by drying over magnesium sulfate, the ethereal phase is concentrated to dryness under reduced pressure and the crude product is purified by chromatography on a silica column (eluant:petroleum ether/diethyl ether, 40:60). Ethyl 1,4-benzodioxin-2-carboxylate is thereby obtained in a yield of 85%.

후처리

  1. concentrationThe reaction mixture is then concentrated under reduced pressure, hydrolysed with 80 cm3 of water
  2. extractionsubsequently extracted with diethyl ether
  3. dry with materialby drying over magnesium sulfate
  4. concentrationthe ethereal phase is concentrated to dryness under reduced pressure
  5. customthe crude product is purified by chromatography on a silica column (eluant:petroleum ether/diethyl ether, 40:60)

출처 및 근거

ORD 기록
ord-737874235af34abf8768f4160d5ecbed
출처 데이터셋
uspto-grants-1995_05
특허 번호
US05420132

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