Trifluoroacetic acid → HCID 59250010, compound

HRID 2091694Notes

Reaction equation

HRID 2091694 reaction equation
[C:1]([C:3]1[C:4]([C:25]2[CH:30]=[CH:29][C:28]([Cl:31])=[CH:27][C:26]=2[Cl:32])=[C:5]([C:20]([O:22][CH2:23][CH3:24])=[O:21])[S:6][C:7]=1[NH:8]CC1C=CC(OC)=CC=1OC)#[N:2].FC(F)(F)C(O)=O>ClCCl>[NH2:8][C:7]1[S:6][C:5]([C:20]([O:22][CH2:23][CH3:24])=[O:21])=[C:4]([C:25]2[CH:30]=[CH:29][C:28]([Cl:31])=[CH:27][C:26]=2[Cl:32])[C:3]=1[C:1]#[N:2]

Participants

4

Reactant 2

HCID 6422Trifluoroacetic acidHCID 59250029HCID 59250029, compound

Product 1

HCID 59250010HCID 59250010, compoundYield 90%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

Ethyl 4-cyano-3-(2,4-dichlorophenyl)-5-[(2,4-dimethoxybenzyl)amino]thiophene-2-carboxylate (4.70 g, 0.00956 mol) was dissolved in dichloromethane (100 mL). Trifluoroacetic acid (25 mL) was added and the solution was stirred at room temperature for ten minutes. The reaction was concentrated in vacuo, diluted with ethyl acetate and filtered. The filtrate was washed with saturated sodium bicarbonate and brine, dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. Column chromatography was performed to yield the title compound (2.92 g, 90%) as a yellow solid. LCMS: (FA) ES+, 341. 1H NMR (400 MHz, d6-DMSO) δ: 8.17 (s, 2H) 7.75 (d, 1H, J=2.00 Hz), 7.52-7.48 (m, 1H), 7.39 (d, 1H, J=8.28 Hz), 4.05-3.92 (m, 2H), 1.02-0.96 (m, 3H).

Workup

  1. concentrationThe reaction was concentrated in vacuo
  2. additiondiluted with ethyl acetate
  3. filtrationfiltered
  4. washThe filtrate was washed with saturated sodium bicarbonate and brine
  5. dry with materialdried over anhydrous sodium sulfate
  6. filtrationfiltered
  7. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-aeda295c12994c528ba70b37e67f263d
Source dataset
uspto-grants-2013_05
Patent number
US08440664B2

Reaction notes

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