Thioguaiacol → (R)-N-[2-Chloro-4-(2-methoxyphenylthio)phenyl]-2-hydroxy-2-methyl-3,3,3-trifluoropropanamide

HRID 841195Notes

Reaction equation

HRID 841195 reaction equation
[Cl:1][C:2]1[CH:7]=[C:6](I)[CH:5]=[CH:4][C:3]=1[NH:9][C:10](=[O:18])[C@:11]([OH:17])([CH3:16])[C:12]([F:15])([F:14])[F:13].[CH3:19][O:20][C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][C:22]=1[SH:27].C[O-].[Na+]>C(O)C.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[Cl:1][C:2]1[CH:7]=[C:6]([S:27][C:22]2[CH:23]=[CH:24][CH:25]=[CH:26][C:21]=2[O:20][CH3:19])[CH:5]=[CH:4][C:3]=1[NH:9][C:10](=[O:18])[C@:11]([OH:17])([CH3:16])[C:12]([F:15])([F:14])[F:13]

Participants

6

Reactant 3

HCID 23642ThioguaiacolHCID 10942334Sodium MethoxideHCID 54268602(R)-N-(2-chloro4-iodophenyl)-2-hydroxy-2-methyl-3,3,3-trifluoropropanamide

Product 1

HCID 54020997(R)-N-[2-Chloro-4-(2-methoxyphenylthio)phenyl]-2-hydroxy-2-methyl-3,3,3-trifluoropropanamide

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 702EthanolSolvent

Procedure

Tetrakis(triphenylphosphine)palladium(0) (0.03 g) was added to a deoxygenated mixture of (R)-N-[2-chloro-4-iodophenyl]-2-hydroxy-2-methyl-3,3,3-trifluoropropanamide (Method 20) (0.2 g), 2-methoxybenzenethiol (0.064 ml) and sodium methoxide (0.058 g) in ethanol (10 ml). The mixture was further deoxygenated by evacuation and refilling with argon (3 cycles) then heated under reflux with stirring under argon for 18 hours, treated with a further portion of tetrakis(triphenylphosphine)palladium(0) (0.03 g), heated a further 24 hours then cooled and filtered. Volatile material was removed by evaporation and the residue was purified by chromatography on a silica gel Mega Bond Elut column eluting with 0-10% ethyl acetate/hexane to give the title compound (0.166 g) as an oil. NMR (CDCl3): 1.75 (s, 3H), 3.7 (br s, 1H), 3.85 (s, 3H), 6.9 (m, 2H), 7.2 (m, 1H), 7.3 (dd, 1H), 7.35 (m, 2H), 8.3 (d, 1H), 9.8 (br s, 1H); MS: 404 (M−H)−.

Workup

  1. customThe mixture was further deoxygenated by evacuation and refilling with argon (3 cycles)
  2. temperaturethen heated
  3. temperatureunder reflux
  4. additiontreated with a further portion of tetrakis(triphenylphosphine)palladium(0) (0.03 g)
  5. temperatureheated a further 24 hours
  6. temperaturethen cooled
  7. filtrationfiltered
  8. customVolatile material was removed by evaporation
  9. customthe residue was purified by chromatography on a silica gel Mega Bond Elut column
  10. washeluting with 0-10% ethyl acetate/hexane

Sources & evidence

ORD record
ord-17ae8b631e8744cba33ef14096c63c86
Source dataset
uspto-grants-2002_04
Patent number
US06369273B1

Reaction notes

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