Potassium Carbonate → Methyl [(5-nitro-1,2-benzisoxazol-3-yl)oxy]acetate

HRID 369593노트

반응식

HRID 369593 반응식
[N+:1]([C:4]1[CH:5]=[CH:6][C:7]2[O:11][N:10]=[C:9]([OH:12])[C:8]=2[CH:13]=1)([O-:3])=[O:2].C(=O)([O-])[O-].[K+].[K+].Br[CH2:21][C:22]([O:24][CH3:25])=[O:23]>CN(C)C=O>[N+:1]([C:4]1[CH:5]=[CH:6][C:7]2[O:11][N:10]=[C:9]([O:12][CH2:21][C:22]([O:24][CH3:25])=[O:23])[C:8]=2[CH:13]=1)([O-:3])=[O:2]

참가 물질

5

반응물 3

HCID 11430Potassium CarbonateHCID 60984Methyl bromoacetateHCID 178526505HCID 178526505, 화합물

생성물 1

HCID 53638345Methyl [(5-nitro-1,2-benzisoxazol-3-yl)oxy]acetate수율 50.5%

시약·촉매·용매 1

HCID 6228Dimethylformamide용매

실험 절차

A mixture of 5-nitro-1,2-benzisoxazol-3-ol (3.90 g, 0.0220 mol) and potassium carbonate (4.17 g, 0.0300 mol) in N,N-dimethylformamide is stirred for 30 minutes, treated with methyl bromoacetate (3.96 g, 0.0260 mol), stirred overnight at room temperature, and poured into an acidic ice-water mixture. The resultant aqueous mixture is extracted with ethyl acetate. The organic extracts are combined, washed sequentially with water and brine, dried over anhydrous magnesium sulfate, and concentrated in vacuo to obtain a yellow oil. Column chromatography of the oil using silica gel and a (1:1) to (4:1) methylene chloride/hexanes gradient gives the title product as a white solid (2.80 g, mp 72-73.5° C.) which is identified by NMR spectral analyses.

후처리

  1. stirringstirred overnight at room temperature
  2. extractionThe resultant aqueous mixture is extracted with ethyl acetate
  3. washwashed sequentially with water and brine
  4. dry with materialdried over anhydrous magnesium sulfate
  5. concentrationconcentrated in vacuo
  6. customto obtain a yellow oil

출처 및 근거

ORD 기록
ord-c0aebb8c3bd4450a87a9a78dfcfbf024
출처 데이터셋
uspto-grants-2000_10
특허 번호
US06140270

반응 노트

불러오는 중…