Potassium Carbonate → 4-Bromo-3-{[(2,4-dimethoxy-benzyl)-methoxycarbonylmethyl-amino]-methyl}-thiophene-2-carboxylic acid methyl ester

HRID 2368735노트

반응식

HRID 2368735 반응식
[CH3:1][O:2][C:3]([C:5]1[S:6][CH:7]=[C:8]([Br:12])[C:9]=1[CH2:10]Br)=[O:4].[CH2:13]([O:15][C:16](=[O:30])[CH2:17][NH:18][CH2:19][C:20]1[CH:25]=[CH:24][C:23]([O:26][CH3:27])=[CH:22][C:21]=1[O:28][CH3:29])C.C(=O)([O-])[O-].[K+].[K+]>CN(C)C=O.C(OCC)(=O)C>[CH3:1][O:2][C:3]([C:5]1[S:6][CH:7]=[C:8]([Br:12])[C:9]=1[CH2:10][N:18]([CH2:19][C:20]1[CH:25]=[CH:24][C:23]([O:26][CH3:27])=[CH:22][C:21]=1[O:28][CH3:29])[CH2:17][C:16]([O:15][CH3:13])=[O:30])=[O:4]

참가 물질

6

반응물 3

HCID 11430Potassium CarbonateHCID 19895532Ethyl 2-(2,4-dimethoxybenzylamino)acetateHCID 67233904Methyl 4-bromo-3-(bromomethyl)thiophene-2-carboxylate

생성물 1

HCID 672333554-Bromo-3-{[(2,4-dimethoxy-benzyl)-methoxycarbonylmethyl-amino]-methyl}-thiophene-2-carboxylic acid methyl ester수율 92.1%

시약·촉매·용매 2

HCID 6228Dimethylformamide용매HCID 8857Ethyl Acetate용매

실험 절차

4-Bromo-3-bromomethyl-thiophene-2-carboxylic acid methyl ester (2.28 g, 7.31 mmol), example 31-b, was dissolved in 18 mL of dry N,N-dimethylformamide. N-(2,4-dimethoxy-benzyl)glycine ethyl ester (1.75 g, 7.31 mmol) and potassium carbonate (1.11 g, 8.04 mmol) were added and the reaction mixture was stirred at room temperature for 18 hours. The reaction mixture was diluted with ethyl acetate and washed with water and brine. The organic fraction was dried over anhydrous sodium sulfate, and concentrated. The crude product was purified by flash chromatography eluting from silica gel with a gradient of 0-60% ethyl acetate in hexanes to produce 3.18 g of a tan oil. MS: (+) m/z 494.1, 496.1 (M+Na+, 79Br/81Br).

후처리

  1. washwashed with water and brine
  2. dry with materialThe organic fraction was dried over anhydrous sodium sulfate
  3. concentrationconcentrated
  4. customThe crude product was purified by flash chromatography
  5. washeluting from silica gel with a gradient of 0-60% ethyl acetate in hexanes

출처 및 근거

ORD 기록
ord-870ce5b7574c4984beca4c70b7bd4735
출처 데이터셋
uspto-grants-2014_04
특허 번호
US08703795B2

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