Acetone, oxime → 3-[2-(Diethyloxymethyl)-benzoyl]-2-[((isopropylidene)amino]oxy]-pyridine

HRID 428047노트

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HRID 428047 반응식
[CH3:1][C:2](=[N:4][OH:5])[CH3:3].CC(C)([O-])C.[K+].F[C:13]1[C:18]([C:19]([C:21]2[CH:26]=[CH:25][CH:24]=[CH:23][C:22]=2[CH:27]([O:31][CH2:32][CH3:33])[O:28][CH2:29][CH3:30])=[O:20])=[CH:17][CH:16]=[CH:15][N:14]=1>O1CCCC1>[CH2:32]([O:31][CH:27]([O:28][CH2:29][CH3:30])[C:22]1[CH:23]=[CH:24][CH:25]=[CH:26][C:21]=1[C:19]([C:18]1[C:13]([O:5][N:4]=[C:2]([CH3:3])[CH3:1])=[N:14][CH:15]=[CH:16][CH:17]=1)=[O:20])[CH3:33]

참가 물질

5

반응물 3

HCID 67180Acetone, oximeHCID 18357614(2-Fluoropyridin-3-yl)-2-(diethoxymethyl)-phenylmethanoneHCID 23665647Potassium tert-butoxide

생성물 1

HCID 183576123-[2-(Diethyloxymethyl)-benzoyl]-2-[((isopropylidene)amino]oxy]-pyridine

시약·촉매·용매 1

HCID 8028Tetrahydrofuran용매2회

실험 절차

To a solution of 0.49 g of acetone oxime in 8 ml of dry tetrahydrofuran was added 0.75 g of potassium tert-butoxide. The solution was stirred for 15 min. then a solution of 1.86 g of (2-fluoropyridin-3-yl)-2-(diethoxymethyl)-phenylmethanone in 8 ml of tetrahydrofuran was added. The solution was stirred at room temperature for 30 min. then quenched by the addition of 25 ml of a 1:1 water-saturated ammonium chloride solution. The solution was extracted with two 50 ml portions of ether and the combined ether extracts were washed with brine and dried over sodium sulfate. Evaporation afforded the intermediate 3-[2-(diethyloxymethyl)-benzoyl]-2-[[(isopropylidene)amino]oxy]-pyridine which was not characterised but dissolved in 30 ml of ethanol and 20 ml of 2 M hydrochloric acid added and the solution refluxed for 15 min. The solution was cooled to room temperature and the crystals of 2-(isoxazolo[5,4-b]pyridin-3-yl)-benzaldehyde were collected by filtration and dried in vacuo, 1H-NMR (200 MHz, CDCl3) d 10.26 (CHO).

후처리

  1. stirringThe solution was stirred at room temperature for 30 min.
  2. customthen quenched by the addition of 25 ml of a 1:1 water-saturated ammonium chloride solution
  3. extractionThe solution was extracted with two 50 ml portions of ether
  4. washthe combined ether extracts were washed with brine
  5. dry with materialdried over sodium sulfate
  6. customEvaporation

출처 및 근거

ORD 기록
ord-29620352c01d496aa0148681a92a2ead
출처 데이터셋
uspto-grants-2001_11
특허 번호
US06313139B1

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