Phosphorus oxychloride → 4-(2,4-dichlorophenyl)-5-(4,5-dihydro-1H-imidazol-2-yl)-2-morpholin-4-ylthiophene-3-carbonitrile

HRID 1926617Notes

Reaction equation

HRID 1926617 reaction equation
[NH2:1][CH2:2][CH2:3][NH:4][C:5]([C:7]1[S:8][C:9]([N:22]2[CH2:27][CH2:26][O:25][CH2:24][CH2:23]2)=[C:10]([C:20]#[N:21])[C:11]=1[C:12]1[CH:17]=[CH:16][C:15]([Cl:18])=[CH:14][C:13]=1[Cl:19])=O.P(Cl)(Cl)(Cl)=O>C1(C)C=CC=CC=1>[Cl:19][C:13]1[CH:14]=[C:15]([Cl:18])[CH:16]=[CH:17][C:12]=1[C:11]1[C:10]([C:20]#[N:21])=[C:9]([N:22]2[CH2:23][CH2:24][O:25][CH2:26][CH2:27]2)[S:8][C:7]=1[C:5]1[NH:4][CH2:3][CH2:2][N:1]=1

Participants

4

Reactant 2

HCID 24813Phosphorus oxychlorideHCID 67073109N-(2-aminoethyl)-4-cyano-3-(2,4-dichlorophenyl)-5-morpholin-4-ylthiophene-2-carboxamide

Product 1

HCID 685293044-(2,4-dichlorophenyl)-5-(4,5-dihydro-1H-imidazol-2-yl)-2-morpholin-4-ylthiophene-3-carbonitrileYield 95.7%

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Conditions

Temperature
120 °C

Procedure

To a suspension of N-(2-aminoethyl)-4-cyano-3-(2,4-dichlorophenyl)-5-morpholin-4-ylthiophene-2-carboxamide (2.50 g, 5.90 mmol) in toluene (20 mL) was added phosphoryl chloride (4.70 mL, 50.0 mmol) and the mixture was stirred under microwave irradiation at 120° C. for 25 minutes. The reaction mixture was evaporated and the residue was suspended in methylene chloride and then quenched with ice water. The aqueous layer was basified by addition of KOH, the layers were separated and the aqueous layer was extracted again with methylene chloride. The organic layers were combined and washed with brine, dried over anhydrous sodium sulfate, filtered and concentrated in vacuo to afford the crude product (2.3 gr, 77%). LCMS: (FA) ES+ 408. 1H NMR (400 MHz, d6-DMSO) δ: 7.78-7.75 (m, 1H), 7.52-7.49 (m, 2H), 3.79-3.73 (m, 4H), 3.63-3.55 (m, 2H), 3.54-3.48 (m, 4H), 3.20-3.11 (m, 2H).

Workup

  1. customThe reaction mixture was evaporated
  2. customquenched with ice water
  3. additionThe aqueous layer was basified by addition of KOH
  4. customthe layers were separated
  5. extractionthe aqueous layer was extracted again with methylene chloride
  6. washwashed with brine
  7. dry with materialdried over anhydrous sodium sulfate
  8. filtrationfiltered
  9. concentrationconcentrated in vacuo

Sources & evidence

ORD record
ord-1a125e71db28464caa28af4dd2e62601
Source dataset
uspto-grants-2012_05
Patent number
US08183240B2

Reaction notes

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