Sodium Hydroxide → 2-Sulfanyl-3-[5-(trifluoromethyl)furan-2-yl]prop-2-enoic acid

HRID 1703543Notes

Reaction equation

HRID 1703543 reaction equation
[F:1][C:2]([F:17])([F:16])[C:3]1[O:7][C:6]([CH:8]=[C:9]2[S:13]C(=S)N[C:10]2=[O:15])=[CH:5][CH:4]=1.[OH-:18].[Na+]>O>[SH:13][C:9](=[CH:8][C:6]1[O:7][C:3]([C:2]([F:17])([F:16])[F:1])=[CH:4][CH:5]=1)[C:10]([OH:18])=[O:15]

Participants

4

Reactant 2

HCID 14798Sodium HydroxideHCID 538729252-Sulfanylidene-5-{[5-(trifluoromethyl)furan-2-yl]methylidene}-1,3-thiazolidin-4-one

Product 1

HCID 713702922-Sulfanyl-3-[5-(trifluoromethyl)furan-2-yl]prop-2-enoic acidYield 60%

Reagents, catalysts & solvents 1

HCID 962WaterSolvent

Procedure

1.58 g of the above 5-(5-trifluoromethyl-2-furylmethylene)rhodanine, 23 ml of 1 N sodium hydroxide solution and 25 ml of water are stirred under nitrogen at room temperature for 10 hours. After cooling with an ice bath and acidification with concentrated hydrochloric acid to pH 1.5, the resulting slurry is filtered to yield a slightly brown precipitate which is washed with 50 ml of water by stirring at room temperature under nitrogen and filtered to yield 0.8 g of slightly brown crystals (yield 60%) of α-mercapto-β-(5-trifluoromethyl-2-furyl)acrylic acid. M.P. 158° C.

Workup

  1. temperatureAfter cooling with an ice bath
  2. filtrationacidification with concentrated hydrochloric acid to pH 1.5, the resulting slurry is filtered
  3. customto yield a slightly brown precipitate which
  4. washis washed with 50 ml of water
  5. filtrationfiltered

Sources & evidence

ORD record
ord-a6308e21aabe4de49ea2542a55d92768
Source dataset
uspto-grants-1978_11
Patent number
US04124718

Reaction notes

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