Water → HCID 10737609, compound

HRID 327170Notes

Reaction equation

HRID 327170 reaction equation
[F:1][C:2]([F:10])([F:9])[C:3]([OH:8])([CH3:7])[C:4](O)=[O:5].S(Cl)(Cl)=O.[C:15]([C:17]1[CH:22]=[CH:21][C:20]([NH2:23])=[CH:19][C:18]=1[S:24][C:25]1[CH:30]=[CH:29][CH:28]=[CH:27][CH:26]=1)#[N:16].O>CN(C)C(=O)C>[C:15]([C:17]1[CH:22]=[CH:21][C:20]([NH:23][C:4](=[O:5])[C:3]([OH:8])([CH3:7])[C:2]([F:10])([F:9])[F:1])=[CH:19][C:18]=1[S:24][C:25]1[CH:26]=[CH:27][CH:28]=[CH:29][CH:30]=1)#[N:16]

Participants

6

Reactant 4

HCID 962WaterHCID 24386Thionyl ChlorideHCID 27751253,3,3-Trifluoro-2-hydroxy-2-methylpropanoic acidHCID 10585340HCID 10585340, compound

Product 1

HCID 10737609HCID 10737609, compoundYield 94.8%

Reagents, catalysts & solvents 1

HCID 31374DimethylacetamideSolvent

Procedure

To a stirred, cooled (-20° C.) solution of 3,3,3-trifluoro-2-hydroxy-2-methylpropanoic acid (1.62 g 10.2 mmol) in N,N-dimethylacetamide (15 mL) was rapidly added thionyl chloride (1.30 g, 10.9 mmol) and the mixture (a precipitate formed after a few minutes) stirred at -20° C. to -5° C. for 1 hour. 4-Cyano-3-phenylthiobenzenamine (1.55 g, 6.85 mmol) was then added in one portion and the mixture allowed to stir at room temperature overnight. The solution was poured into water, extracted with ethyl ether (2×100 mL); the etheral extracts dried (MgSO4), filtered and the solvent removed in vacuo. The residue was chromatographed on 315 g of silica gel using a ethyl ether (0%, 10%, and 20%) in methylene chloride gradient. The proper fractions were combined, the solvent removed in vacuo and the residue dissolved in a mixture of 100 mL hexane and 150 mL methylene chloride. Most of the methylene chloride was distilled off as the solution was scratched to induce crystal growth. After cooling the solid was collected and dried at 85° C. /0.1 mm to yield the title propanamide (2.38 g, 91%); mp 111°-113° C. 1H--NMR (250 MHz, CDCl3): 1.67 (s, 3H, CH 3), 3.68 (s, 1H, OH), 7.27 (d, 1H, J=1.9 Hz, aromatic), 7.40-7.51 (m, 5H, aromatic), 7.59-7.69 (m, 2H, aromatic), 8.51 (s, 1H, NH). MS (CI, CH4): 367(M+1).

Workup

  1. customthe mixture (a precipitate formed after a few minutes)
  2. stirringto stir at room temperature overnight
  3. extractionextracted with ethyl ether (2×100 mL)
  4. dry with materialthe etheral extracts dried (MgSO4)
  5. filtrationfiltered
  6. customthe solvent removed in vacuo
  7. customThe residue was chromatographed on 315 g of silica gel using a ethyl ether (0%, 10%, and 20%) in methylene chloride gradient
  8. customthe solvent removed in vacuo
  9. dissolutionthe residue dissolved in a mixture of 100 mL hexane and 150 mL methylene chloride
  10. distillationMost of the methylene chloride was distilled off as the solution
  11. temperatureAfter cooling the solid
  12. customwas collected
  13. customdried at 85° C. /0.1 mm

Sources & evidence

ORD record
ord-49436b304a874002adb72b38f04a28eb
Source dataset
uspto-grants-1993_12
Patent number
US05272163

Reaction notes

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