Pyridine → N-methyl-N-methoxy-(E)-5-methyl-4-bis(4-fluorophenyl)methylidene-2-hexenamide

HRID 1197639노트

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HRID 1197639 반응식
[CH3:1][CH:2]([CH3:24])[C:3](=[C:9]([C:17]1[CH:22]=[CH:21][C:20]([F:23])=[CH:19][CH:18]=1)[C:10]1[CH:15]=[CH:14][C:13]([F:16])=[CH:12][CH:11]=1)/[CH:4]=[CH:5]/[C:6]([OH:8])=O.[C:25](Cl)(=[O:29])C(Cl)=O.Cl.CONOOC.[N:38]1C=CC=C[CH:39]=1>C1C=CC=CC=1.C(OCC)C>[CH3:39][N:38]([O:29][CH3:25])[C:6](=[O:8])/[CH:5]=[CH:4]/[C:3](=[C:9]([C:10]1[CH:15]=[CH:14][C:13]([F:16])=[CH:12][CH:11]=1)[C:17]1[CH:22]=[CH:21][C:20]([F:23])=[CH:19][CH:18]=1)[CH:2]([CH3:1])[CH3:24]

참가 물질

7

반응물 4

HCID 1049PyridineHCID 65578Oxalyl chlorideHCID 18954766(E)-5-methyl-4-bis(4-fluorophenyl)methylidene-2-hexenoic acidHCID 22015712N,O-dimethoxyhydroxylamine hydrochloride

생성물 1

HCID 19107622N-methyl-N-methoxy-(E)-5-methyl-4-bis(4-fluorophenyl)methylidene-2-hexenamide수율 83.9%

시약·촉매·용매 2

HCID 241Benzene용매HCID 3283Diethyl Ether용매

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온도
60 °C

실험 절차

To the above carboxylic acid (1.70 g, 5.2 mmol) dissolved in benzene (15 ml) was added under argon atmosphere oxalyl chloride (1.27 g, 0.87 ml, 10.0 mmol) distilled right before use. After stirring at 60° C. for 2 hours, the solvent and excess oxalyl chloride were removed by evaporation at 60° C. under 20 Torr. To the residue dissolved in dichloromethane (25 ml) were added N,O-dimethoxyhydroxylamine hydrochloride (0.52 g, 5.34 mmol) and pyridine (0.85 g, 0.86 ml, 10.7 mmol), and the whole was stirred at room temperature overnight. The mixture was diluted with diethyl ether (100 ml), and the organic layer was washed with saturated ammonium chloride aq solution (100 ml×twice), dried over anhydrous magnesium sulfate, and concentrated in vacuo. The resulting crude product was purified by column chromatography (silica gel, ethyl acetate:hexane=3:7) to give 1.62 g (82% yield) of N-methyl-N-methoxy-(E)-5-methyl-4-bis(4-fluorophenyl)methylidene-2-hexenamide.

후처리

  1. distillationdistilled right before use
  2. customthe solvent and excess oxalyl chloride were removed by evaporation at 60° C. under 20 Torr
  3. dissolutionTo the residue dissolved in dichloromethane (25 ml)
  4. stirringthe whole was stirred at room temperature overnight
  5. washthe organic layer was washed with saturated ammonium chloride aq solution (100 ml×twice),
  6. dry with materialdried over anhydrous magnesium sulfate
  7. concentrationconcentrated in vacuo
  8. customThe resulting crude product was purified by column chromatography (silica gel, ethyl acetate:hexane=3:7)

출처 및 근거

ORD 기록
ord-1b1848c492904f24a71c6200451350ab
출처 데이터셋
uspto-grants-1994_01
특허 번호
US05276154

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