2-Butenoic acid, 3-(acetylamino)-, methyl ester, (2Z)- → HCID 72948938, compound

HRID 56130Notes

Reaction equation

HRID 56130 reaction equation
[F:1][C:2]1[CH:3]=[C:4]([CH:6]=[CH:7][C:8]=1[N:9]1[CH:13]=[CH:12][CH:11]=[CH:10]1)[NH2:5].C[Al](C)C.[NH:18](/[C:22](/[CH3:28])=[CH:23]\[C:24](OC)=[O:25])[C:19]([CH3:21])=O>C(Cl)Cl>[F:1][C:2]1[CH:3]=[C:4]([N:5]2[C:24](=[O:25])[CH:23]=[C:22]([CH3:28])[N:18]=[C:19]2[CH3:21])[CH:6]=[CH:7][C:8]=1[N:9]1[CH:13]=[CH:12][CH:11]=[CH:10]1

Participants

5

Reactant 3

HCID 57053602-Butenoic acid, 3-(acetylamino)-, methyl ester, (2Z)-HCID 105834103-fluoro-4-(1H-pyrrol-1-yl)anilineHCID 16682925Trimethylaluminum

Product 1

HCID 72948938HCID 72948938, compoundYield 35%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Procedure

To a solution of 3-fluoro-4-(1H-pyrrol-1-yl)aniline (0.80 g, 4.55 mmol) in CH2Cl2 (30 mL) was added trimethylaluminum (23 mL, 23 mmol, 1 M in heptane) slowly. The reaction mixture was stirred at rt for 0.5 h, followed by the addition of a solution of methyl 3-acetaminocrotonate (785 mg, 5.0 mmol) in CH2Cl2 (10 mL). The reaction mixture was stirred at rt for 3 days, then quenched with saturated NH4Cl aqueous solution and extracted with CH2Cl2 (100 mL×3). The combined organic phases were dried over anhydrous Na2SO4 and concentrated in vacuo. The residue was purified by a silica gel column chromatography (PE/EtOAc (V/V)=3:2) to give the title compound as a pale yellow solid (450 mg, 35%). The compound was characterized by the following spectroscopic data:

Workup

  1. stirringThe reaction mixture was stirred at rt for 3 days
  2. customquenched with saturated NH4Cl aqueous solution
  3. extractionextracted with CH2Cl2 (100 mL×3)
  4. dry with materialThe combined organic phases were dried over anhydrous Na2SO4
  5. concentrationconcentrated in vacuo
  6. customThe residue was purified by a silica gel column chromatography (PE/EtOAc (V/V)=3:2)

Sources & evidence

ORD record
ord-c51a376569774e38b072969bf00ca77a
Source dataset
uspto-grants-2016_09
Patent number
US09434695B2

Reaction notes

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